Duramax Diesels Forum Truck of the Week
  #1  
Old 10-25-2009, 08:21 PM
tpijeep tpijeep is offline
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Default Engine Starts and instantly dies

I have been battling this for a while and search has yielded no results. On occasion I will start my truck and it will fire and die in under a second, then you have to crank it about 3 times longer then normal for it to run normally. It generally does this when hot but not always.. I just put a new set of injectors in it because i had all the symptoms of injector failure, it now runs perfectly but today it pulled its no start trick.

After 2 days of wrenching it was dishearting to have it die again...
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  #2  
Old 10-25-2009, 09:10 PM
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the plastic bleed screw on the fuel filter housing may me leaking air into the fuel system
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  #3  
Old 10-25-2009, 09:32 PM
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Could be the filter isnt quite sealed, too. May also be a very small air leak in one of the rubber fuel lines.
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  #4  
Old 10-26-2009, 07:41 AM
tpijeep tpijeep is offline
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Okay, I am doing a H2O/Meth kit today, I will check the hoses, filter is new, didn't know if a leak on the low psi side could cause this. Thanks..
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  #5  
Old 10-26-2009, 07:58 AM
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Does it set any codes? Sometimes the ignition fuses under the hood loosen up and doesn't make good connections causing similar problems.
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  #6  
Old 10-26-2009, 07:57 PM
tpijeep tpijeep is offline
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Default

No codes, checked the filter, checked the lines on the filter, went to real hose clamps rather than the factory clamps, still had the no start once after.. Dealer claims they have never had that issue, this was after they denied my injector claim at 117k
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  #7  
Old 10-27-2009, 08:27 PM
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Default

Check your cam sensor. Sounds exactly like a problem I had.
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  #8  
Old 10-27-2009, 08:29 PM
Max Power Max Power is offline
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Default

Are you sure it's not a passlock security issue?

IF you have EFI Live, try disabling VATS and see if that fixes it.

Last edited by Max Power; 10-27-2009 at 08:30 PM.
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  #9  
Old 10-27-2009, 08:46 PM
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Quote:
Originally Posted by Max Power View Post
Are you sure it's not a passlock security issue?

IF you have EFI Live, try disabling VATS and see if that fixes it.
Thats what I was talking about with the fuse issue. When it loosens up the ecm thinks someones trying to steal it and shuts it off. If it's that fuse disabling the VATS will not change anything though. To check it out it will be harder to find. See if your door chime changes sound while wiggling the ign. fuses under the hood.
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  #10  
Old 10-28-2009, 08:12 AM
tpijeep tpijeep is offline
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Default

Double whammy here, no EFILive and the factory door chime was removed when I got rid of the factory radio.. I have never seen the Vats light flash when it did this so I am not sure... any other ideas with the cam sensor?
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  #11  
Old 06-03-2010, 10:35 AM
ncalmax ncalmax is offline
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Default

I hate to bring back an old thread but I have the same thing going on.
2004.5 duramax

Here is a quick run down of mine situation. It started doing this last summer when temps were over a 100*. If I shut the truck off when it's over 100* it will do it every time. Run for 15-20 secs then shut down(loses fuel preasure). It also does this if I shut it off if it's below 35*.

So now that it is starting to warm up it now does it when I shut it off at 85* and hotter. If the temps are between 35*-85* it will start fine every time no issues.

I have replaced two fuel filters I took it to the dealership they checked the housing and all around that area for leaks and found nothing.

Hope someone can help it's getting very old having to prime it back up.
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  #12  
Old 06-03-2010, 10:49 AM
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if priming it starts the truck you are either drawing air or bleeding off pressure.

is your truck stock?
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  #13  
Old 06-04-2010, 09:10 AM
ncalmax ncalmax is offline
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No not stock just a bullydog programmer and straight exhaust.
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  #14  
Old 06-15-2010, 04:37 PM
duramaxGMC duramaxGMC is offline
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Default

My truck is doing the exact same thing. The temperature over 85 is the same also. I prime the air out and it starts up after a few seconds every time. It is getting air in the fuel line from some where. I am going to replace my bleeder screw first. ???
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  #15  
Old 06-15-2010, 05:49 PM
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wes06dmax wes06dmax is offline
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Default

There is a line next your prime pump that looks like a spark plug line make sure it is all the way down I have a friend that had the same problem and we tryed everything i was getting agravated and just touched it and it made a clicking sound and it has run fine ever since
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