ive been off the site for awhile,and finally got around to getting re-registored and its good to be back.

the last few days temps have been sub zero and i have been having some issues with the low rail psi code. i am on my 2 new fuel filter in 2 days and i usally change them at 8k-10k mile intervals. i always fill up at the same station and always use power services for additive. the problemis, last night the p0087 came up again and it was faily cold,-22 or so, and i got home,left the code,and this morning i cleared it. it ran fine for about 10 miles and then set the code off again. by now i have changed filters 2x and i was hoping fuel wasnt the problem. i took aout the predator and have been beeting the p@#s oout of the truck all day and i cant get a code to show again. does the preditor increase rail pressure to the point where even a little bit of thick fuel will hinder the filters ability to keep the ecm happy??? sorry for the rambling, filters and fuel are a little expensive to keep swapping out every few days.

Thanks

I ran into the same problem today. Was out of town and had 3/4 tank of fuel and a bottle of power service white. Truck started falling on it's face when going uphill and if you give it full throttle it would shut down....Pulled over to a station and added a full bottle of power service 911 and 4oz more of the p/s white and it did not work out of it for another hour of driving.

Had a code on the truck, ran a scanner on it and had the fuel rail pressure too low code as yours...Cleared it and seems to run fine now, will not reproduce the code. However the temps warmed up almost 17 degrees since it started gelling up....

thats the thing, it runs like normal with out the tuner in it. i tried calling diablo sport last friday, but that was a joke......

ive noticed that with my preditor also...but it hasnt been cold enough to reproduce it lately...it only got to around -15 today....ran funny but no codes

ive noticed that with my preditor also...but it hasnt been cold enough to reproduce it lately...it only got to around -15 today....ran funny but no codes


have you tried taking the predator ouy? and have you been getting the codes before?

If your temps are hitting -22 changing filters is gonna do nothing but lighten your wallet! The programmer will make the fuel gelling/low rail pressure appear quicker as you are pumping more fuel through faster. Basically you are putting a Band-Aid on a broken leg by merely changing filters. When temps are at those extremes you HAVE to take preventative measures for gelling.

If it was me not only would I run Power Service, Diesel 911, Stanadyne, Sea Foam or one of the many other anti-gelling additives, I would also run about 5 gallons of Kerosene per tankful. Kerosene has a MUCH lower gelling point than diesel and should cure your code throwing/limping/gelling issues.

You dont need to remove the programmer just fix the gelling issue and all will be well.

Good luck and let us know!
Cheers!:beerchug:
Mike

I experienced the same problem today, it was 14 outside and I haven't been running fuel additives. Had it scanned by Advanced but they wouldn't clear the code due to state laws or some b.s. When I set the code the truck wouldn't let me go above 2000 rpms, anyone else have this problem? After I shut the truck off and started it again the check engine light was still on but I had all of my power back.

If your temps are hitting -22 changing filters is gonna do nothing but lighten your wallet! The programmer will make the fuel gelling/low rail pressure appear quicker as you are pumping more fuel through faster. Basically you are putting a Band-Aid on a broken leg by merely changing filters. When temps are at those extremes you HAVE to take preventative measures for gelling.

If it was me not only would I run Power Service, Diesel 911, Stanadyne, Sea Foam or one of the many other anti-gelling additives, I would also run about 5 gallons of Kerosene per tankful. Kerosene has a MUCH lower gelling point than diesel and should cure your code throwing/limping/gelling issues.

You dont need to remove the programmer just fix the gelling issue and all will be well.

Good luck and let us know!
Cheers!:beerchug:
Mike


thanks for the input. like i said, i use power servive at every fuel up until about 40degrees or so. in minnesota, lots of the stations are mixing the soy diesel crap into the fuel, i cant remember what percent but from what i hear,that causes LOTS of problems when it gets cold. as fair as using the diesel911 or kerosene, any ill affects? i know your not supposed to use the 911 to much, or at least ive been told. my old man uses the regular power service in his Peterbuilt and ralely uses the 911 unless its realllly cold.

I just had a buddy stop by with his 07 LBZ checked his code and found a P0 0087. He is running PS white bottle, but has about 12 or 13 thousand miles on his filter. Didn't have a filter to change, so he's gonna change it later. Its cold out, and he knows that it is something that may occur right now.

Riley

Diesel 911 is more of a cure for gelled fuel than a preventative, as far as Kerosene, 5 gallons mixed in with a full tank of diesel is fine. Its not like you're running it year round, only in "extreme cases".

As far as an emergency cure for a gelled filter, last year mine gelled @ -10F so after driving 56 miles each way to work and back in limp mode, I used mf GF's hairdryer on HIGH and positioned it so it was blowing directly on the filter housing/top of filter. Lower the hood and leave it, after about 20-25 minutes mine was good to go. I ran it another 6 or 7K miles til it was time to change the filter. Dont know how well this will work for a severel gelled/waxed filter but it worked for mine.

Cheers!:beerchug:
Mike

wow a hair dryer...thats a first...good thinking:)

alot of this is going back to gelling up or the fuel getting thick, but the thing is,whaen i pulled the filter off, it wasnt waxy at all. not even any water in it. i just realized i didnt put that in my original post. oops

I live in Minnesota have an LBZ and have the same problem. It only happened to me once last winter so I was wondering if it had anything to do with taking my cat off just before this winter. I replaced it when it started getting cold out so it wouldn't happen again, but at 88% it went again on me last friday. So i replaced it and it has now happened to me at 98% less than a week later. I also run the predator and thought it might be the cause so i put mine back on stock tune last week when i replaced the filter, so obviosly that isn't the cause. Not knowing much about diesels I was thinking of bringing my truck to the dealer in the morning I was just hoping the low exhaust gas recirculation from removing the cat wasn't causing any of the problem and they would blame it on me. I never really new diesels needed anything added to the fuel for the winter, I think i will definatly try that before going to the dealer let me know what you figure out.

And just to add i havn't added the egr blocker plate yet did that make any differance for you? Mine throws the code but dosnt set the engine light of so i don't really want to block it.

Read limp mode three times your out a few posts down, posted on the 18th. Just so happens when i replaced the first of my three filters this winter I also re oiled my volant filter at the same time. I notice you have an intake, do you have a k+n style filter, if so how many times have you oiled it?

keep in mind if you use ULSD fuel, it will gel quicker than the LSD, so the diesel injection shop tells me. That was a discussion back when the ULSD was coming out.

I experienced the same problem today, it was 14 outside and I haven't been running fuel additives. Had it scanned by Advanced but they wouldn't clear the code due to state laws or some b.s. When I set the code the truck wouldn't let me go above 2000 rpms, anyone else have this problem? After I shut the truck off and started it again the check engine light was still on but I had all of my power back.

Happened to me twice. Go to a different Advance or AutoZone. They have cleared this for me more than once and I'm in Bloomington. Don't see why the State would pass a law about low fuel rail pressure. But it is Illinois and anything is possible.

keep in mind if you use ULSD fuel, it will gel quicker than the LSD, so the diesel injection shop tells me. That was a discussion back when the ULSD was coming out.

To make matters even worse, it appears that some ULSD brands are not playing well with the fuel/anti-gel additives.

Check post #4 in the following thread.

http://www.dieselplace.com/forum/showthread.php?p=2347187#post2347187

Read limp mode three times your out a few posts down, posted on the 18th. Just so happens when i replaced the first of my three filters this winter I also re oiled my volant filter at the same time. I notice you have an intake, do you have a k+n style filter, if so how many times have you oiled it?

yes i do hava an oil type filter. but i dont oil it a lot. those filters flow pretty well and just cause they look dirty doesnt mean they need to be cleaned and oiled. i have my egr blocked and et codes all the time,usallly at cool down or idle. i drove 350 miles up north and it didnt set a egr code until i stopped, let it idle down, and put fuel in it. i have also seen lots of p0101(?) mass air sensor codes. not sure y, but live with it until i take it in when i put my stock airbox back on

Craiggenz - just FYI, you're probably getting lots of P0101 codes because of that oil-type air filter. The oil gets sucked through the filter and makes the MAF sensor dirty, making it throw codes. Go get some electrical parts cleaner or brake cleen, and hose it off. I would suggest taking off the oiled air cleaner, but that's just my preference. :)

Sorry man, I didn't see that you already have done that..just read it in another post!! :) sorry.

Sorry man, I didn't see that you already have done that..just read it in another post!! :) sorry.


no problem.