Code P0087. Other than a clogged fuel filter what other common things can cause this?

fuel pressure regulator, pump, sucking air etc.

fuel pressure regulator, pump, sucking air etc.

Well I am not loosing prime, I can let it sit for days and the primer is still primed. I am really hoping I just got a bad load of fuel and I just need to change the filter again. I am going to do that today and then cut the filter open and see what it looks like. Hopefully it not a pump or regulator. If it gets worse or becomes a major issue then its just going to get a good code clearing and a trip to the dealer and get traded.

Kinked fuel line or restriction between the tank and the pump. Also a plugged tank vent would do it.

Mine was doing the same thing until I added a lift pump. I still get it every once in a while if I am pulling heavy with any added power. You can probably just shim the fuel valve and solve the problem. I plan on shimming mine when I get the time. From what I have been told this fixes the probem.

x2 on checking the tank vent, esp. w/ your miles.

Is your truck going into limp mode when the ses light comes on??? Thats what my truck did (low rail pressure) and limp mode, cant imagine how frustrating it must be w/a trailer. My truck was a pian to drive (back when it ran), in limp mode w/no load.

Its a real pain since it only does it with a trailer. It was fine on the last couple trips now its done it 3 times today, cel and limp. I just reach down plug in the code reader and clear it. Going to change the filter in the am and save it and cut it open when I get home. Maybe I just got some really crappy dirty fuel when I filled the aux tank.

Mine was doing the same thing this weekend while pulling my trailer. First I had my banks on level 3 and I'm WOT up a grade and bam! dead on it's face, cel and limp p0087 code. Cleared it and bumped banks down to 2. Next serious grade I'm WOT and bam! same thing. cleared it and the rest of the trip was on level 1 with no problem. Called banks today and they said it's a known problem and they are working on it and think they will have a new software fix for it in the next 30 days. I have had the same thing happen with and without codes in 2-sl on the banks but thought it was just me so I did all the learning the tranny stuff again and I still get it, so I bought a shim kit from PPE but have since decided it probably won't fix it... Haulin-rv, are you getting this while stock? How heavy were you hauling? I has pulling about 16.5K high profile 5er up some serious grades but it still shouldn't do that.

Mine was doing the same thing this weekend while pulling my trailer. First I had my banks on level 3 and I'm WOT up a grade and bam! dead on it's face, cel and limp p0087 code. Cleared it and bumped banks down to 2. Next serious grade I'm WOT and bam! same thing. cleared it and the rest of the trip was on level 1 with no problem. Called banks today and they said it's a known problem and they are working on it and think they will have a new software fix for it in the next 30 days. I have had the same thing happen with and without codes in 2-sl on the banks but thought it was just me so I did all the learning the tranny stuff again and I still get it, so I bought a shim kit from PPE but have since decided it probably won't fix it... Haulin-rv, are you getting this while stock? How heavy were you hauling? I has pulling about 16.5K high profile 5er up some serious grades but it still shouldn't do that.

First, good luck getting that software update. Thats the one that was supposed to fix my problem and was supposed to be out 2 months ago. They told me for weeks that I would have a beta vesion via email tomorrow. I am now Banks-less and will NEVER buy there stuff again.

Second, yes mine is doing it stock and not even at full throttle. Mine started doing it like yours and has continued and seems to have gotten worse. The only difference may be mine does not do it all the time.

Third, how did the V2 work? Wast worth it?

First, good luck getting that software update. Thats the one that was supposed to fix my problem and was supposed to be out 2 months ago. They told me for weeks that I would have a beta vesion via email tomorrow. I am now Banks-less and will NEVER buy there stuff again.

Second, yes mine is doing it stock and not even at full throttle. Mine started doing it like yours and has continued and seems to have gotten worse. The only difference may be mine does not do it all the time.

Third, how did the V2 work? Wast worth it?
Read this:
http://www.dieselplace.com/forum/showpost.php?p=1859122&postcount=43
Was it worth it... I'm still not sure. I can say that my temps are now kept in check and when they do get up there, they are quickly chased back down. (quicker than stock) so I would say that all is good. If you read my report though you'll see that my tranny is heating up pretty good while grade braking... Take a look at my route attachment and it's easy to see why. Anyway, I was still seeing fan action when I didn't expect to... my ECT would be ~190 but the engine fan would be partially engaged. I'm wondering if there isn't some other triggers for it like tranny temp also. My tranny temps were ~230 at the time so maybe that's it. I'm going to be getting some data for Mike L. and we'll see what we can do. Does your tranny heat up while grade braking down serious grades with 16K+ behind you? My LLY didn't but the LBZ tranny seems to run hotter...

First, good luck getting that software update. Thats the one that was supposed to fix my problem and was supposed to be out 2 months ago. They told me for weeks that I would have a beta vesion via email tomorrow. I am now Banks-less and will NEVER buy there stuff again.

Second, yes mine is doing it stock and not even at full throttle. Mine started doing it like yours and has continued and seems to have gotten worse. The only difference may be mine does not do it all the time.

Third, how did the V2 work? Wast worth it?
BTW, what did you do with the EGT probe when you sent banks their system back? Did you plug the manifold with something or leave the probe in. I'm thinking of sending banks my system back and telling them when they actually have a fix, call me, but I don't know what to do about the EGT probe and associated hole in my manifold.

BTW, what did you do with the EGT probe when you sent banks their system back? Did you plug the manifold with something or leave the probe in. I'm thinking of sending banks my system back and telling them when they actually have a fix, call me, but I don't know what to do about the EGT probe and associated hole in my manifold.

I just put a pipe plug in the whole. Been looking at egt guages and mounts, just can not decide on what I want.

I made it the rest of the way to Fort Worth, Tx without a cel and am on my way back to p/u to go to Mississippi. Going to stop at home tomorrow change the filter and cut the old one open and see what it looks like.

I just put a pipe plug in the whole. Been looking at egt guages and mounts, just can not decide on what I want.

I made it the rest of the way to Fort Worth, Tx without a cel and am on my way back to p/u to go to Mississippi. Going to stop at home tomorrow change the filter and cut the old one open and see what it looks like.

Good luck. What are you using to clear the codes now?

Good luck. What are you using to clear the codes now?

Innova 3030 code scanner. Walmart $70!!.

I think this is one area where the plug in harness boxes suffer. The ECM does not see the extra fuel going in and cannot adjust accordingly. I haven't towed a whole lot with my 2007, but I can floor it thru the gears and no codes UNLESS my filter is plugged. I've left this truck completely stock except for my tuning for the primary purpose of testing.

Filter restriction verification:

http://www.kennedydiesel.com/images/Dmax-fuel-filter-rest1.gif

JMO but dont screw with the facotry relief if its not failing the bottle test. Many people seem to throw a shimmed relief at the LBZ or a race valve "just in case" or for what ever reason and it baffles me quite honestly. Dont screw with it if its not broke. Do a bottle test and verfy that it isnt leaking past it.

A gauge measuring restriction would help narrow down if its in the supply side(as long as its not sucking air)

Might be interesting to see what the regulator was comanding.....you have acess to EFI live or a tech 2 or something?

A 87 code is for low rail. Causes could be the cp3 isnt getting the fuel it needs, the cp3 isnt able to squash the fuel the way it should, or you have something bleeding off pressure(reliefe, internal leak, injector returning alot of fuel) or the truck calling for more fuel than the cp3 can deliver(programing)

I'd verify supply first.

racehemi is over in joliet and if you bribe him with beer and wings he would probably let you barrow his efi live and his gauge to do some logs and also to verify supply restriction.

There is a bit of discussion in the fuel air mod section that may be helpfull as the guys running higher HP run into this issue. Take a look at doing a bottle test as well. Info on that is in the sticky in that section

Edit: You are 100% stock right? no lift pumps and no programer or box right?

Yes I am 100% stock.

What ever came of this, i got a cheapie scanner back in 06 and it wont read the d max????

What ever came of this, i got a cheapie scanner back in 06 and it wont read the d max????

Still getting it when I tow, not all the time though.

I have the banks pda for now but I also have a OBD pocketscan from autozone. It will give you the codes and you can use the lookup tool here to get the info. I forgot how much but it seems like $35...

Still getting it when I tow, not all the time though.
HUMMM, maybe your truck ahs the same problem mine does, just took your a lot longer to develp, who knows, if you get it figured out let me know. I think putting my truck on a dyno (ie load since rigth now dont to much of anything) would help exhibit the problem, maybe yours too if it ever gets bad enough for you to fix it.

Well I am going to look at the filter and if thats not it have it looked at, if its not a simple fix or it ends up being an ongoing issue, its gone. I already have a deal on the table to trade out and basically just start over for about $20 more a month. I almost already did it, but then I made a couple trips with no issues.

Well I am going to look at the filter and if thats not it have it looked at, if its not a simple fix or it ends up being an ongoing issue, its gone. I already have a deal on the table to trade out and basically just start over for about $20 more a month. I almost already did it, but then I made a couple trips with no issues.

Did your truck do this back before the Bank's install, Or after running it awhile,I know you have ran it for awhile so maybe your fprv is getting weaker now would be worth doing the bottle test but also make sure you are under a load with it try towing heavy and getting into it to retry and get the same issue to come up again,doesnt help trying the bottle test if you not towing trucks not under the same load and demanding the same rail pressure just my 2 cents.Hope you get it fixed.

Clogged a fuel filter once. Then all the codes have been since I installed and also uninstalled the Banks.

Changed the filter, was fine for less than 400 miles. Its currently 90+ outside and I am towing a 31ft TT. The fan is engaged and a/c is on, it seems with the load it just throws the light. Temps are under 210 on engine and right at 200 on the trans. I just keep reseting it, I mine as well just leave the code scanner plugged in.

I was thinking about when this started, it was after I installed the Banks. I cranked the banks up to 6 w/ speedloader and did a few 0-60 and 1/8 passes, cel light came on and there was 4-5 codes. 0087 was one and the other I do not remember, I think one was something turbo related. Could it be as simple as fprv being weak now?

I think it could be its worth a shot try the bottle test look on here and you will find out how to do it. you can not buy the fprv by its self come in rail from gm just to let you know. Good Luck

What about shimming it?

It's cheap just to try it. I bought the shim kit from PPE. Shipping was more than the kit. I haven't put it in yet because I started to doubt that was the problem. Mine only does it when I'm running a level on the banks. Actually now it seems to only do it when I'm pulling my trailer and not on level 1. I've been beating my truck a little the last two weeks in SL setting trying to see find a common point that I can say "it always happens when..." but so far I only got the truck to "kick out" once and there was no code. The rest of the time has just been some fun driving and some poor fuel mileage. :D

yes you can shim it, I used 3 shims, becareful putting it back togther in the vice if you go to tight and mash the lip on the fprv or put any marks on it it will start leaking around there and the rail will be junk thats what happened to mine buddy got in a rush adn I didnt watch him, He installed in vice with no card board fprv right into the vice jaws and it screwed the seat in the rail up and the 26k psi found its way past there not long after.

Ok.....i could be wrong here but this is the way I see it. If you arnt failing a bottle test fuel isnt getting past your relief valve. If fule isnt getting by it then it isnt the casue for your leak. Yes its cheap to throw some shims in there but if you nick the rail internaly or otherwise screw up the install you can realy be kicking yourself. JMO but dont fix what isnt broke.

Do a bottle test first. http://www.dieselplace.com/forum/showthread.php?t=159975

I have no problem doing the bottle test, but does it need to throw the code while you are doing it? I have not had it throw a code when not towing, and its pretty hard to be playing mechanic out on the road with a load. Once I drop this trailer in the am, I beat on it a bit and see if I can get it to code. It seems to only code when its got a trailer hooked, and since I have been paying more attention the fan has also been howling away too every time.

The directions would indicate that you need it to do whatever it is doing (limp, code, "pop", whatever) while you have the bottle hooked up. Then you check the bottle for fuel.

I would think for the test to be accurate youd need to be exibitng the problem. If the problem isnt happening when your doing the test, then the test may or may not be accurate. Like I said if youg et it figured out let me know

That makes sense. I am not going to be home until late Friday, so testing will have to wait until then. I plan on going and getting a trailer so I will have at home for the weekend so if I can not get it code with out a load I can load it up.

Mine was not blowing the fprv it was going around the lip of the fprv at high demands of pressure, would only code at anywere around 90 to 110 mph while into it hard, Might want to use a 2 liter bottle lol.

Only 2 ways it can leak by the FPRV
1. out the return line were it is supposed to relieve to(a bottle test will show leakage)
2. all over the back of your motor.

The P0087 is tripped when its a certian amount off comanded for a certian period of time under fuel enrichment as i understand it. Some interesting things I found when logging my rail.....I would nail it and it would suck the rail WAY down, down to 17k psi or so, 1-2 would happen and at the shift injectors stopped sucking fuel yet pump was spinning = pressure spike(or recovery more or less, it dodnt go over 26k), then 2nd it would suck the rail down good and recover or spike on the 2-3 shift, same thing 3-4 but it was actually maintaining a bit better. Here I am now in a high gear around 105 MPH. I have been in a gear for quite some time and havent had the shift spike in fueling to "reset" its timmer. I'm actually running better rail than down low(22k IIRC) but it codes. Even if I nail it from a 50 MPH roll it will still code about 105 as it is being in that gear it will be down for long enough to trip it. I always coded around 105. Except on the pulling track. being in 3rd low for 250' seemed to piss it off were running through the gears never would.

I get it when I'm WOT up a grade pulling my 5er with Banks set on anything but 1 (stock). Not right away but if the grade is long enough then pop. Does that mean that the stock fuel pump can only keep up with stock power levels. (i.e. can't even handle extra fueling from level 2 on the banks?) That sux!

Could just mean you have a dirty fuel filter. :)

May need a lift pump, may have other issues. Hard to say. Sorry :(

LOL take a ride in mine and ready th erail pressures for me Philip, I traped 115 and still hold good rail and at 135 still holding strong, I would like to get efi live and log it would make it nicer then holding scanner

I no longer watch a scanner while driving ;) It can get a lil hairy ;) :eek: always use a passnager or another driver. :D

Whats "good rail"???

edit: I see this thread you replied here. http://www.dieselplace.com/forum/showthread.php?t=167244 This has some more info that may be helpfull especially for the performance croud. Think the poster has an actual issue as he has issues on stock power

Could just mean you have a dirty fuel filter. :)

May need a lift pump, may have other issues. Hard to say. Sorry :(
I can change the fuel filter but the truck only has 3500 miles on it so I doubt it's that. It's done it since 1000 miles when I put the banks on.

Maybe you got a bad tank of fuel. Doubt full but supply is always the first thing to try and eliminate.

Maybe you got a bad tank of fuel. Doubt full but supply is always the first thing to try and eliminate.

Could a bad tank of diesel fuel plug the filter that quick?

Yes....it would need to be pretty nasty though.

I just changed a filter that had less then 4000 miles on it. I cut i t open and it was black with lot's of crud on it. I was setting low rail pressure codes. After the filter change all has been good for the past 400 miles.

I think I just got a bad tank of banks. No banks tuning = no code.

A program will creat more demand for fuel. You may be ok with stock power but the added demand will make a restriction rear it s head.

True enough. My point is that without something in the way like a clogged fuel filter, the stock system should have no problem delivering enough fuel for levels 2 and 3 of a system like banks or edge.

Geezzz....you guys sound just like the dealer service department.... bad fuel eh....I read somewhere that that never happens..... hehehe

True enough. My point is that without something in the way like a clogged fuel filter, the stock system should have no problem delivering enough fuel for levels 2 and 3 of a system like banks or edge.

For the power gained I do agree that he stock system should supply it fine. :) Something isnt right :)

Hey lets get back to me:D, I beat it w/ no trailer and could not get a code. Going to try and get a trailer tomorrow and try the bottle test Saturday. Unless I just trade it in before then:p:.

Ok, just left a rest area held it wfo and before I hit 70 cel p0087. So it seems to be getting worse. If it passes the bottle test, then what?

Need to also check your supply. See what kinda restriction you have. It may be starving for fuel.

If its not a supply issue and its not leaking past the HPRV then it can be a injector returning too much fuel or your cp3 or reg in it going weak I would guess.

You bought the one year 300,000 mile warranty didn't you? :lol:
(sorry, the miles on your truck amaze me)
Hey Haulin,
Just out of curiosity, do you have the DIC that tells you how many gallons of fuel your engine has drank? What's your number?

You bought the one year 300,000 mile warranty didn't you? :lol:
(sorry, the miles on your truck amaze me)
Hey Haulin,
Just out of curiosity, do you have the DIC that tells you how many gallons of fuel your engine has drank? What's your number?

Yes I do, but I reset it when I get fuel. My best guess is somewhere in the 21,000 gallons area. I know I have spent around $60,000 on fuel last year and so far this year.

A fuel pump could get tired after pumping 21,000 gallons of fuel couldn't it?

Well I had a deal set to trade it in, but the other truck just got sold:mad:. So I am not going to give up, going to do the bottle test tomorrow. Also think I am going to order either a fass or air dog pump in the am too, make that will help out a tired cp3:D. I am going to go look at another truck in the am to have as a back up, heck you can never have enough diesel trucks right;)?

Well I had a deal set to trade it in, but the other truck just got sold:mad:. So I am not going to give up, going to do the bottle test tomorrow. Also think I am going to order either a fass or air dog pump in the am too, make that will help out a tired cp3:D. I am going to go look at another truck in the am to have as a back up, heck you can never have enough diesel trucks right;)?
What brand and options? BTW, I saw a mega cab dually dodge today. I didn't they made those?

What brand and options? BTW, I saw a mega cab dually dodge today. I didn't they made those?

The one that fell through was an 07 Mega Cab Dually. The other one I think I am going to buy as a back up truck is a 96 F350 Crew Cab Dually, its got a nice conversion package, and only 91k on it.

is there a reason you wouldnt go back Gm? I'm not being a wise acre just asking honestly...?
I do like that megacab, i love my truck but if it would have been a long bed I'd have one w/ a manual trans.
The 96 would have the 7.3?? I've heard nothing but good things about those... not the biggest powerhouses but they'll get you there reliably and economically.

I would first look at putting a pressure/restriction gauge on it before I threw a lift pump at it. I mean a lift pump wont hurt it.......but you may have a restriction somewere in the fule system.

The one that fell through was an 07 Mega Cab Dually. The other one I think I am going to buy as a back up truck is a 96 F350 Crew Cab Dually, its got a nice conversion package, and only 91k on it.
Mega cab dually long bed?

That Ford is really low mileage. Almost like it was just for towing a horse around or car trailer around to shows and events. Does it have a sleeper cab?

is there a reason you wouldnt go back Gm? I'm not being a wise acre just asking honestly...?
I do like that megacab, i love my truck but if it would have been a long bed I'd have one w/ a manual trans.
The 96 would have the 7.3?? I've heard nothing but good things about those... not the biggest powerhouses but they'll get you there reliably and economically.

Well I have had 7 Cummins powered trucks, and really want the bigger cab so thats why the Dodge. I agree the early powerstrokes are not the most powerful, but they do run for a long time. I had one that made it past 500k.

I would first look at putting a pressure/restriction gauge on it before I threw a lift pump at it. I mean a lift pump wont hurt it.......but you may have a restriction somewere in the fule system.

Do you mean the gauge Kennedy sells? As far as the fass or air dog, I like the filters too. So I figure it can't hurt to have it on in the long run.

like he sells yes or something cheaper. i have seen johns set up and it is very slick but for jst this deal......probably get by with something not as trick.

on the off chance that there is a restriction in the pick up or something.....it would suck to cook a new lift pump.

Also if your not seeing a restriction i dont see a pump helping much. i do agree that one(especially with aux filtration) is nice but if you not going to keep the truck or wish to spend as little as possibe i would hate to see you throwing parts at it.

may also have a small air leak. a lift pump may cure this(or it could make a fuel leak)......but if your the kind that wants it fixed for as little $ as possible just finding that leak would solve the issue

just trying to help ya with options :)

So I could just use a standard vacuum gauge like this.

Yup. Your stock truck is only under vaccume before the CP3. If you add a lift pump you want a vaccume/pressure gauge that is rated for fuel.

i cant see the numbers it lists......and maybe someone can chime in with how many inches are acceptable for a stocker at WOT and idel.

Idle 2-3 inches aboot 5-6 WOT. Anything more and you're having some problems.

I am thinking you are not going to find a problem with fuel lines seeing it has run well all these miles . But I keep hearing things about the fuel tank pickup that I don't understand because I never seen it . In my opinion if you find a fuel supply problem look at the fuel filter housing or the fuel tank pickup .

I got a vacuum gauge, but how do I hook it up? It looks like an ac type fitting with the little push button valve in the center. Where do I get that adapter?

By the way the old f350 was a nice truck, but just could not pull the trigger and buy it. All I can say is driving an older truck sure makes you appreciate what our trucks are.

Leaving in about 15 min to go to Michigan to Merchants Automotive, time to let a pro figure it out!

You can get a T and tie in right after the fuel filter.

Let us know, FI have been watchign this one very closely, maybe give me something to looka t w/my truck, maybe not yours has a lot more miles then mine, but maybe.

Let us know, FI have been watchign this one very closely, maybe give me something to looka t w/my truck, maybe not yours has a lot more miles then mine, but maybe.

Take yours and go see Eric at Merchants. I bet he can fix it, mine went from maxing out at 18000 psi to what it supposed to be at 26000 psi. He is finishing it up as I type. They are the best shop I ever worked with, call him you will not be disappointed!!

Take yours and go see Eric at Merchants. I bet he can fix it, mine went from maxing out at 18000 psi to what it supposed to be at 26000 psi. He is finishing it up as I type. They are the best shop I ever worked with, call him you will not be disappointed!!

Glad to hear it. What did Eric find wrong?

Take yours and go see Eric at Merchants. I bet he can fix it, mine went from maxing out at 18000 psi to what it supposed to be at 26000 psi. He is finishing it up as I type. They are the best shop I ever worked with, call him you will not be disappointed!!
What is he doing? Lift pump (s)? Also, did you dyno your truck to find this out? Just curious how tight these motors are after 280k or so. :cool:

Jason

I am guessing CP3.

Yeah, its fixed. NO test drive needed to find the issue, only one to ensure its fixed.

Didnt add any aftermarket parts on either. Just fixed it. Haulin can tell ya what we done to his, I dont want to go blah blahin about every detail because every truck is not gonna be fixed by the same repair. We were no more then saying good bye and another LBZ pulls in the lot with 279k on it wacking out a P0087 code as well. Spent the afternoon on it and the problem did not get fixed with the same repair.

Great to meet members of the board, a perk of having my job. The fun part is meeting you all, the hard part is fixing the stuff sometimes. I do my best.

Take yours and go see Eric at Merchants. I bet he can fix it, mine went from maxing out at 18000 psi to what it supposed to be at 26000 psi. He is finishing it up as I type. They are the best shop I ever worked with, call him you will not be disappointed!!
I have heard many good things. The only thing that scares me is gm voiding my warrenty. Theres too much money (parts are expensive was an expensive truck) to just throw my warrenty out the window. Assuming we used origional gm parts etc, I suppose gm woudl never know but jsut scares me that somehow they find out and void everything, dealers around here seem to reall ##al retentive. I dont know where Im going w/myt ruck yet but I dont want ot hijack your thread. I am curious to what he found out w/your truck and the one after taht. Does he have a dyno or a way to load the truck?

I have heard many good things. The only thing that scares me is gm voiding my warrenty. Theres too much money (parts are expensive was an expensive truck) to just throw my warrenty out the window. Assuming we used origional gm parts etc, I suppose gm woudl never know but jsut scares me that somehow they find out and void everything, dealers around here seem to reall ##al retentive. I dont know where Im going w/myt ruck yet but I dont want ot hijack your thread. I am curious to what he found out w/your truck and the one after taht. Does he have a dyno or a way to load the truck?


Give a call to the shop in the AM and I'll go over what I know with you. Nothing I do will void the warranty, bad part is only being that I cant do it under warranty. ( not a dealer )

No dyno, on my truck Eric looked and found my fuel pressure would not go past 18,000 psi no matter what was called for. He started with the basic tests and just kept looking and found a restriction and fixed it. The test then showed when the system demanded higher than 18,000 (26,000 actually) it went right up as told. Then he also cleaned out the stack (radiator, a/c cond and intercooler) in the front and the amount stuff he got out was unreal. I tried many times to clean, but from what was in there I was not successful. Again I will say this was the most pleasant experience I have ever had getting work done. If you are going to keep the truck bring it up there and let Eric diagnose the problem, GM can't void your warranty for letting someone that knows a Duramax look at it.

Where or what was the restriction?

Figures, I cant ever win at gambling. Went to Atlantic City, lost big time. Guess I should stick with sure things :D

Just got my first 87 yesterday. I was throwing em often pre-lift pump install. My mods are my sig. I was doing an empty run from 70-120 passing and bam..no power and there was the ol familiar code. Fuel filters are new with less than 2000 miles on them. I have the race valve installed also.
Wish there was a fix.

Well I picked up a trailer today and ran the truck harder than I usually do and NO CODES!!! Also the clean out that they did on the stack was well worth it, never had the fan come on even when I was running it hard. BTW it was almost 90.

Well I picked up a trailer today and ran the truck harder than I usually do and NO CODES!!! Also the clean out that they did on the stack was well worth it, never had the fan come on even when I was running it hard. BTW it was almost 90.
Thats great to hear Carl! Thanks to you I've been watching these threads more and more. Finding that there are a LOT of causes for this code. I think we will see more and more of these in the future.

I told ya there was a lot of crap in the stack. ;)

I have been w/o the internet for 1 1/2 days, but what was your restriction?? What was the acutal cause. Im going to pm eric at merchants, my repurchase date is monday the 23rd, either I have ti up to harvard chevrolet by then or they will send the check and paperwork bakc and no repurchase will be made. Id really like somone to talke a look at it, see waht its gonna take to get it fixed before I make my decision. I realize technically they cant void my warrenty esp if I use gm products, and I have no dobut merchant is very very qualified to work on the truck however, being as anal as the dealers are around here it scares me theyll deny my warrenty cause the fix didnt occur w/in their 4 walls of a chevy dealer.

I told ya there was a lot of crap in the stack. ;)

Ok, I have a dumb question.:o: Is a "stack" the A/C condenser-turbo intercooler-radiator setup?

yep

yep k

just replaced a fuel filter (per the DIC) less than 1000 miles on the filter and got the dreaded P0087 code twice in the hills of MD/WV with a 30' tag behind me.

BTW one advantage of the scanguage, it is always hooked up and clears codes on the go easily;)

Unfortunately, I cannot do anything about it till September. I am in Redwood Falls, MN for a farm show this week. Helping my nephew move to FL next week. In SD the following week for another show and in IL the following week for yet another show:(

It has only done it 3 times now. 2 in the hills and once bobtailing and hammering on it right around 100 MPH.

just replaced a fuel filter (per the DIC) less than 1000 miles on the filter and got the dreaded P0087 code twice in the hills of MD/WV with a 30' tag behind me.

BTW one advantage of the scanguage, it is always hooked up and clears codes on the go easily;)

Unfortunately, I cannot do anything about it till September. I am in Redwood Falls, MN for a farm show this week. Helping my nephew move to FL next week. In SD the following week for another show and in IL the following week for yet another show:(

It has only done it 3 times now. 2 in the hills and once bobtailing and hammering on it right around 100 MPH.

Thats how mine started still got the code after a filter change and I would only get it when pulling a trailer up a hill. On flat ground no problem and empty no problem. Eric was able to get my fuel pressure back up by playing in the fuel rail, but in the end the pump was also week and if I ran it hard with a trailer it could not keep up. So on Monday they put a pump in, pulled a trailer yesterday to Missouri and no issue. Funny thing was that the first day I was there another rv hauler rolled w/ an LBZ and had the same problem...Hmmm maybe thats why pumps are on backorder!

I told ya there was a lot of crap in the stack. ;)
With the "crap in the stack" is this a reason to block the EGR or is the "crap" generator elsewhere?

Usually that refers to bugs and dirt and rocks embedded in the radiator that blocks airflow

Usually that refers to bugs and dirt and rocks embedded in the radiator that blocks airflow

Oh, I thought they were talking about crap internally from the EGR...

Finding that there are a LOT of causes for this code. I think we will see more and more of these in the future.



What are some of the things you are finding?

So Haulin RV's problem was a weak CP3? It just get lose and die over time? What was lose or starting to take a dump? The reg or the pump itself? What was done in the fuel rail?

Usually that refers to bugs and dirt and rocks embedded in the radiator that blocks airflow

The amount of crap that was in there was unreal, and I try to clean it myself on a pretty regular basis. The cleaning has worked wonders, my fan barely runs now.

Oh, I thought they were talking about crap internally from the EGR...

I was shocked how much crap was in there from the egr, so we blocked it.

So Haulin RV's problem was a weak CP3? It just get lose and die over time? What was lose or starting to take a dump? The reg or the pump itself? What was done in the fuel rail?

In my case Eric found the orifice in the fuel rail had deposits on it and took care of that. That worked to get the fuel pressure back up, but when I was towing and pulled a grade I guess the cp3 was just tired and could not keep up. All seems to be well now.

:cool:

The amount of crap that was in there was unreal, and I try to clean it myself on a pretty regular basis. The cleaning has worked wonders, my fan barely runs now.




I was shocked how much crap was in there from the egr, so we blocked it.



In my case Eric found the orifice in the fuel rail had deposits on it and took care of that. That worked to get the fuel pressure back up, but when I was towing and pulled a grade I guess the cp3 was just tired and could not keep up. All seems to be well now.


Did he have to pull the radiator to clean the stack? After 287,000+ miles I would think the CP3 would be getting a little tired :)

Did he have to pull the radiator to clean the stack? After 287,000+ miles I would think the CP3 would be getting a little tired :)

They pulled it all out, intercooler, radiator, and ac condenser. Its amazing how much it helped.