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Have a 2004 duramax lly with new and injectors, glow plugs…

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have a 2004 duramax lly...
have a 2004 duramax lly with new and injectors, glow plugs and fuel injection pump. motor runs for 20 minutes then quits. any thing that might stand out?
Submitted: 2 years ago.Category: GMC
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Answered in 1 hour by:
3/4/2016
GMC Mechanic: Daniel Wilson,
 replied 2 years ago
Daniel Wilson
Category: GMC
Satisfied Customers: 6,898
Experience: Owner at DJ Wilson
Verified

Hi Kevin, My name is***** this quits is it instant like you turned off the key switch or like it is starving for fuel?

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GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Check for fuel leaks most commonly at the fuel filter housing near the water in fuel sensor as they are known to crack and leak causing a loss of fuel pressure. Let me know

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Customer reply replied 2 years ago
It acts like it is starved for fuel. Filter new and no leaks.
GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Is it throwing a check engine light? also pressurize the fuel tank with air to see if it might reveal some leaks as it could be opening up a crack when the engine warms since it is 20 minutes into running.

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GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Hi Kevin, Did you get this resolved?

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Customer reply replied 2 years ago
No. Truck is at gmc repair now
GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Thanks for the update. Would you like to close this out?

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Customer reply replied 2 years ago
I would like to wait until next week as GM has not been able to diagnose the problem.. New injectors, new glow plugs, new high pressure fuel pump, and now waiting on a FICM. Sounds like they are throwing parts at the problem which concerns me. Said only codes were #1 injector and glow plug. It ran when it went in shop. Now they can't keep it running. Runs for 20 minutes then shuts off. Will have an update at 6p
GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Let me know. Thanks for the update.

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Customer reply replied 2 years ago
Had to pick up the truck-the mechanic can't get it to run- new injectors, glow plugs, fuel rail, high pressure fuel pump, ficm. No codes are coming up. Seems he was just throwing parts at it in hopes of success. Any thoughts?
GMC Mechanic: Daniel Wilson,
 replied 2 years ago

If fuel pressure is good and no leaks, module is new and no codes, I would check for engine speed signal from the crank sensor which a loss of speed signal will disable injection. Check for that and let me know.

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GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Hi Did you get this resolved?

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Customer reply replied 2 years ago
No resolution. Had to have it towed back to my lot and in the process of finding someone to follow up on someone else's work.
GMC Mechanic: Daniel Wilson,
 replied 2 years ago

Thanks for the update. That is never fun trying to retrace someone elses steps. Let me know if I can be further help once you get back into it.

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