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Starts but will not stay running

Tiny
MAX GIBSON
  • MEMBER
  • 1994 CHEVROLET 2500
  • 5.7L
  • V8
  • 2WD
  • 153,000 MILES
My C2500 starts but will not stay running. I have a video of what it is doing. The ECM was saying the air intake valve sensor was bad. I replaced it, the fuel filter, spark plugs, coil, wires, entire distributor with ignition module cap and rotor. Seems to be getting enough fuel and spark. Runs smooth. If I give it gas it chokes out. I checked the TPS and it is working. Baffled.
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Saturday, September 23rd, 2017 AT 11:52 AM

5 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,481 POSTS
This sounds like you have an EGR valve that is not closing all the way here is a video of how to check the valve once you remove it.

https://youtu.be/DqUCbbKdWf4

Please let us know what happens.

Cheers
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Saturday, September 23rd, 2017 AT 11:56 PM
Tiny
RON EALY
  • MEMBER
  • 1 POST
I have exact same problem.
Does anyone have an answer to this? Please!
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Sunday, May 13th, 2018 AT 9:00 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,481 POSTS
Same truck and information? Please use this link to give all the information you can as well as things that have been tried already. That way more people will see the question.
https://www.2carpros.com/questions/new
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Sunday, May 13th, 2018 AT 11:41 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
Lets run the codes it see what comes up it sounds like the fuel pump is going out. Here are two guides to help us get started:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

and

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Please run down these guides and report back.

Cheers, Ken

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Sunday, May 13th, 2018 AT 11:41 AM
Tiny
  • MEMBER
  • 0 POST
I am a little late to this post, but I had this problem and the dealer replaced the EGR valve cost me $330.00 but at least it is fixed.
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Monday, May 14th, 2018 AT 7:27 PM

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