I replaced both the controller and the fuse for the glow plugs but it still wont start... Now if onoly a couple of the glow plugs are bad will it still start or no? I almost got it started on ether but i really dont like spraying a bunch of that in there... Im getting power to the controller and out of the controller...

Any help will be greatly appreciated, i really dont wanna have to take it in...

Pluge it in for a hr. and try WD-40 to get it going,if you have 2 or 3 bad it will stell start

my block heater is bad too... its pretty warm out today, its about 40 outside so i dont see why it wont start.

I replaced both the controller and the fuse for the glow plugs but it still wont start... Now if onoly a couple of the glow plugs are bad will it still start or no? I almost got it started on ether but i really dont like spraying a bunch of that in there... Im getting power to the controller and out of the controller...

Any help will be greatly appreciated, i really dont wanna have to take it in...
Clip a light on the rail that runs down the side of the block on the glow plugs and see if the plugs are geting power on key up

are you sure its not fuel related?? i would try having someone pump the primer while you try to start it.

are you sure its not fuel related?? i would try having someone pump the primer while you try to start it.
x2

checked the prime twice and i have fuel... even pumped it while starting and still nothing. never had a problem with the fuel before... i've had the 0380 code for awhile but it still started fine... and one morning up north the truck didnt wanna start and it took some coaxing with ether to finally start and i had to let her run all nite just to get home the next day, and no problems, and no loss of power while driving... she just wont start.

im pretty pissed off at this point and idk what the hell is wrong... im def. not taking it to the dealer tho... cuz everyone knows they'll just bend me over... im gonna see if this mechanic i know can take a look at it but if anyone else has any advice please let me know... this is my daily driver and my baby LoL, i need to get her running!!

i may try putting a new fuel filter on too cuz i changed the fuel filter before i left for upnorth, and it started really acting up after i did that... even tho its a brand new filter it may faulty or somtin...

is that worth a try??

I ran without any glowplugs for about a month here in colorado. Temps down to 40 degrees at night. Took longer to start and had smoke at idle until it warmed up, but didn't have any problem getting the truck started.

You must have more than one problem.

Get your fuel rail pressure checked while cranking on it. Might be injectors going out.

Get your fuel rail pressure checked while cranking on it. Might be injectors going out.


how would i go about getting that checked?? and what psi should it be at? and from my understanding the previous owner had the injectors replaced when he owned the truck and i've owned it for about 3 years now... how often do they go bad???

Clip a light on the rail that runs down the side of the block on the glow plugs and see if the plugs are geting power on key up


i checked the power on that rail today and the plugs are getting power, but whos to say that the plugs are actually heating up?? my uncle said he had the same problem with his powerstroke and it wouldnt start but barely when using ether, and he had to replace all the glow plugs; i know diferent truck different senario but idk...

im not getting any codes either.

If you arent getting any codes then I am pretty sure you got another problem. I had 4 glow plugs bad on my truck and it throwing a code. Then about 2 months later the light came back on and it was a bad controller.


Sounds like when my injectors bit the dust. The truck was running fine, and then when I went to leave my buddies house it wouldn't start.

well according to the stealership im out of the warranty on my injectors... so i really dont know what to do now... obviouslly i wanna fix whatever it is but i dont wanna spend all that money to replace the injectors and have that not b the problem...

Either find someone who has a Tech II or EFI Live so you can watch your rail pressure. If not then a quick trip to the dealership is going to be in order. If they are a good dealership they should check your cranking pressure/max pressure for about a half hour diag. 40 bucks. Thats at least what I charge since its an easy test.

Did you take it in for diag or did they just tell you they wont be covered?

Did you take it in for diag or did they just tell you they wont be covered?

i didnt get it diagnosed, i called them... cuz im not gonna take it up there and have them charge me to look at it then have it not covered by the warranty.

well i guess the new question is; Is there anyone in metro detroit with efi live or tech II???

one thing you can try real quick that seems to work for some reason....throw a new fuel filter on there and see what it does. my bet is that it will start better for a few days but quickly go back to same-old same-old. it does sound to me like you need to look away from the glow plugs and go to fuel because at 40* it should start.....also have you checked for fuel in your oil?

one thing you can try real quick that seems to work for some reason....throw a new fuel filter on there and see what it does. my bet is that it will start better for a few days but quickly go back to same-old same-old. it does sound to me like you need to look away from the glow plugs and go to fuel because at 40* it should start.....also have you checked for fuel in your oil?

i just put a new fuel filter on it yesterday but havent tried cranking it yet cuz i found that the plastic primer scr3ew is cracked so i gotta replace that and i gotta charge my batteries from cranking on it so much... i will check the oil for fuel right now...

no fuel in the oil...

the bleeder screw leaking could defanately have caused this problem but pumping the primer while cranking should have taken care of it. you may also want to check the water in fuel sensor.

I ran without any glowplugs for about a month here in colorado. Temps down to 40 degrees at night. Took longer to start and had smoke at idle until it warmed up, but didn't have any problem getting the truck started.

You must have more than one problem.
x 2 at 30 degrees

i checked the power on that rail today and the plugs are getting power, but whos to say that the plugs are actually heating up?? my uncle said he had the same problem with his powerstroke and it wouldnt start but barely when using ether, and he had to replace all the glow plugs; i know diferent truck different senario but idk...

im not getting any codes either.
How cold is it

i was talking with my buddy about it (he's a diesel tech, works on cats and cummins) and he said one of my fuel pumps may have gone... or mayb a relay if there is one for the pumps. i turned it on and listened for the sending pump and heard nothing. so im gonna investigat a little more... any other input??

well i guess the new question is; Is there anyone in metro detroit with efi live or tech II???
In Monroe :D EFI

How cold is it


the past two days when i was trying to start it it was about 40 and the sun was shining so it felt warmer... so it should have fired even if the glow plugs werent heating up, but i think they are...

im pretty convinced at this point that its a fuel issue... cuz ive started it before with no to little glow plug heat and it eventually fired. i think i just built up enough compression...

im gonna check the pumps and fuses/relays, but wouldnt the computer give me code if i was getting low fuel pressure??

In Monroe :D


well that aint too far. LoL im in roseville. but i guess anything is far when u cant drive there:(

i was talking with my buddy about it (he's a diesel tech, works on cats and cummins) and he said one of my fuel pumps may have gone... or mayb a relay if there is one for the pumps. i turned it on and listened for the sending pump and heard nothing. so im gonna investigat a little more... any other input??
You donot have a (OEM) left pump

You donot have a (OEM) left pump

my fuel system is all stock...

the past two days when i was trying to start it it was about 40 and the sun was shining so it felt warmer... so it should have fired even if the glow plugs werent heating up, but i think they are...

im pretty convinced at this point that its a fuel issue... cuz ive started it before with no to little glow plug heat and it eventually fired. i think i just built up enough compression...

im gonna check the pumps and fuses/relays, but wouldnt the computer give me code if i was getting low fuel pressure??
It's looking like inj. have gone south

my fuel system is all stock...
No pump,the cp-3 pulls the fuel from the tank

It's looking like inj. have gone south

Damn!!!! i was praying that wasnt it... i know they were replaced already once right before i got the truck... how often do they go bad??

i called the dealer this morning and he said it was a 60 month 100,000 mile warranty but i thought it was a 7 year 200,000 mile warranty?

and would the efi live tell me that was definately the problem? or would it just be easier to take it to the dealer for them to tell me... cuz idk how hard its gonna b to tow this thing all around just to diagnose the problem and them bring it back home to fix it if im not covered under any warranty...

I think it is 200,000 miles and mybe 5 ? 7 years on the inj. not good,had my 02 inj. warrented 2 years ago at 189,000 miles

I think it is 200,000 miles and mybe 5 ? 7 years on the inj. not good,had my 02 inj. warrented 2 years ago at 189,000 miles


it is a 7 year 200,000 mile warranty. its an extension on the 5 year 100,000 mile warranty. i found the actual GM document online. LoL im gonna print it out.

so u think i should just take it to the dealer and have them diagnose it?

Fix the bleeder screw first, if it's leaking and sucking in air while your cranking, it won't start.

Try to get the truck into a warm garage somewehre to help it start if your block heater is bad.

Yes injectors are covered 7 yrs 200,000 miles.

The glow plugs are easy enough to change yourself if you want too.

My truck was doing the hard start when it was colder and it turned out to be injectors too.

The truck has to be warm and then the tech can command max fuel rail pressure, about 159kpa and anything under 157kpa is considered bad, then they can do a return rate test to confirm injector problem, and you could get new injectors under warranty if your still covered.

.

Make sure its not just the fuel pump relay on the main fuse panel. I had mine go out about a month ago and she wouldn't fire. I finally swapped it out for my dad's, and presto, she ran like a charm. I think your daytime running lights usses the same relay. You could swap those and see if it does the trick. Its worth a try anyway.

alrite guys well im calling it a nite... im gonna mess wit it a little bit tomorw and let you know what i find out... thanx for the info...

You can also bring it to Eric at Merchant Automotive, he's a sponsor here, and will get it running for you.

Make sure its not just the fuel pump relay on the main fuse panel

remind me again what purpose the fuel pump relay serves on a duramax???

You can also bring it to Eric at Merchant Automotive, he's a sponsor here, and will get it running for you.


yea i thought about that, but they're over near holland, MI. about 3 hours away from me...:(

remind me again what purpose the fuel pump relay serves on a duramax???
im not positive but i think the relay goes to the fuel shut off so that the truck will run and turn off. but again that is mostly a guess.

Make sure its not just the fuel pump relay on the main fuse panel. I had mine go out about a month ago and she wouldn't fire. I finally swapped it out for my dad's, and presto, she ran like a charm. I think your daytime running lights usses the same relay. You could swap those and see if it does the trick. Its worth a try anyway.
:iamlost:

the thing i dont understand is if its the injectors... how come when i got it started and drove it home it ran fine?? i had good mileage, no loss of power or anything...

the thing i dont understand is if its the injectors... how come when i got it started and drove it home it ran fine?? i had good mileage, no loss of power or anything...


It's much easier to keep a diesel running than to get one started in the first place. If you don't have enough pressure the fuel won't atomize and is harder to ignite, plus the starter turning at 200-ish rpm doesn't put much heat into it.

Did you try removing the Bully Dog Power Pup Programmer and see if it helped

Did you try removing the Bully Dog Power Pup Programmer and see if it helped


i'll try that...

Called gm to see what the warrenty was on the inj. that thay put in my truck at 179,710 mile,12 mo. 12,000 miles.The truck has 331,000 miles and is starting to smoke a bit at idle,the balance r. is ok but I can tell thay have seen better days after a 150,000 miles,I do have a new set of inj. so I think it is time,I have 2 new sets of tips 40% over x.honed and a set a new stock tips,I think the 40 over are to big for the work truck ? my have to go with the stock tips ? and the new bodys :mad:

that sux... idk what it is but the winter kicked the shit outta my truck... its suppose to be in the 40s on saturday but if i cant get it started by then, i just may have to take it to the dealer...

this guy at work said he may be able to get a hold of someone who has tech II but idk how likely that'll b...

alrite well i took the bully dog off the truck, and tried starting it a couple times... still nothing. although it is only 10 degrees out today. and my batteries are pretty drained...

i put the charger back on it, but i dont think its looking good. idk what to do now. i really dont wanna take it to the dealer, i'd rather take it to a performance shop but idk who would ba ble to fix it around here...

have you reset the computer..clear all codes.. spent three day's cheasing nostart after replacing alternator..cleared the code and started right up.. just a thought.good luck

have you reset the computer..clear all codes.. spent three day's cheasing nostart after replacing alternator..cleared the code and started right up.. just a thought.good luck


i just reset the computer today and im not getting any codes...

i don't know if i mentioned it before but i recently had the same kind of problem with mine. it ended up being high return rate from the injectors. what it does is there is to much fuel flowing through the injectors and not letting it pressurise enough. the way they are supposed to test it is with graduated cylinders and actually look at the flow rate but they actually got mine to fail by low mpa's. they replaced all 8 and the truck has done very well since. i know that at my dealer they charged $74 for the first part of the scan (the part that they can do with the tech II) but i never got a price if they would have had to do the flow rate test. but it does sound to me like you may be to that point of having to hit the stealer and see what they say. good luck.

i don't know if i mentioned it before but i recently had the same kind of problem with mine. it ended up being high return rate from the injectors. what it does is there is to much fuel flowing through the injectors and not letting it pressurise enough. the way they are supposed to test it is with graduated cylinders and actually look at the flow rate but they actually got mine to fail by low mpa's. they replaced all 8 and the truck has done very well since. i know that at my dealer they charged $74 for the first part of the scan (the part that they can do with the tech II) but i never got a price if they would have had to do the flow rate test. but it does sound to me like you may be to that point of having to hit the stealer and see what they say. good luck.

yea i think ur right... :( thanx...

hopefully you can still get them covered. i have heard of people being able to use the origional purchase date instead of the born on date to get them covered. but that is why you shouldn't wait to get them tested. if nothing else i have heard of them working with people since they are just a little out of coverage.

the thing i dont understand is if its the injectors... how come when i got it started and drove it home it ran fine?? i had good mileage, no loss of power or anything...


IIRC when cranking if the ECM doesn't see 10MPa (1,450psi) it wont command the injectors on. So they may not leak enough to cause drivability problems but if they leak just enough, combined with possible slow cranking speed then you'll have your no start.

IIRC when cranking if the ECM doesn't see 10MPa (1,450psi) it wont command the injectors on. So they may not leak enough to cause drivability problems but if they leak just enough, combined with possible slow cranking speed then you'll have your no start.

You recall correctly! Also need at least 140 RPM cranking speed. Not sure if that effects the computer, or if that is what it takes to get to 1450psi?

well the deed is half way done... im having her towed to the stealership this weekend, so they can diagnose her sickness:(

i'll keep u guys updated to let you know what they say and if they give me that run around about the warranty if it truly is the injectors... LoL

I think I have a similar issue, just not as bad yet. Found the fuse good, the controller powering up and then powering down after 15-30 seconds. But no power at the plugs. Must be a broken wire or maybe the flat steel connector. A bit afraid at this point as the nuts are rusted bad. Didn't pull the fender liners as it's all too wet and snowy now.

Keep us updated on what you find out. Some (like me) are learning from your pain, so it's not all for nothing!

jb

cougar, make sure you are checking the right parts. if you have a federal truck there are 2 relays in the moduel. one controls the intake air heater and the other does the glow plugs. so you may be getting power to the heater but not the plugs indicating a bad controler. i got mine from the dealer for only like $65 i think but don't quote me on that. i would double check that before chasing a wire.

well i dropped her off this afternoon... i guess i'll wait and see what the stealer has to say... :(

http://i39.tinypic.com/205ef54.jpg

hey at least they picked it up with another bow tie. could have been pulled in on a ford.

hey at least they picked it up with another bow tie. could have been pulled in on a ford.


LoL yea i know, i woulda been really embarrassed. haha

my buddy works for ruehles towing, so he helped me out... it had a d-max in it too!! :cool:

ok well the dealership called me today and said they had to prime the hell outta the system, to get it started. so im figuring it was from that cracked primer screw... they said the fuel pressure was fine and the injectors are good. they said it may also have to do with the type of fuel filter, but idk bout that cuz it ran fine before with the same type of filter. im sure they just want you to buy ac delco...

but they told me they're gonna try to cold start it tomorw morning and make sure everything is still running good...

good luck! it may turn out to be a bad water-in-fuel sensor. i have heard of them leaking as well.

well they started it this morning and everything is running good!! i picked it up and she's running real good! i guess it was that cracked primer screw that screwed me. LoL no pun intended haha

its such a relief to have my truck back!! i missed driving her!

thanks everyone on here that helped me or tried to help me!!! i swear i'd prolly b lost without this site...

glad it got figured out

x2....it's always good to hear that some things get fixed easily. if you are still worried about it at all and want to make sure that you don't still have an air leak what you need to do is get some clear tubing and run it from the fuel computer to the filter head and then from the filter head to the pump and look for air bubbles. so if it does it again or if you just want piece of mind thats the next thing to try so you can keep that beauty running.

ps: love the stacks, if i didn't have a hard bed cover on mine i would have a pair myself and i still might find a way to put them on but i have some banks monster duals on the way soon.

Time for a lift pump ? :D

Time for a lift pump ? :D

LoL yea quite possibly...:cool:

glad it got figured out
X 2

Time for a lift pump ? :D


A single pump would have cost you less than that trip to the dealer! At least that's what I told myself when I ordered one.

jb

A single pump would have cost you less than that trip to the dealer! At least that's what I told myself when I ordered one.

jb


well the dealer was only $100. so thats a pretty cheap pump. LoL but i see what u were getting at. haha