Turns over fine but does not want to start until you stop trying then it tries by stumbling?

Tiny
RHUNT
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 147,000 MILES
Engine turns over fine but does not want to start until you stop trying then it tries by stumbling. In other words when you stop hitting start with the key and let it return to on position the engine tries to start. A couple of times I have got it to start and run when it stumbled.
Thursday, February 9th, 2017 AT 11:37 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This is almost surely a fuel pressure issue. So we need to start running through this info but focus on the fuel issue. Take a look at this video to get started.

https://youtu.be/dCjmRL3p4Cs

Next here is a guide that will walk you through doing the fuel pressure test that I suspect will show our issue:

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

Once we know what the fuel pressure is we will know better what direction to go but if we need to replace the fuel pump here is the info to get that completed:

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

I attached the process from the manual as well so please let us know what you find with this.

Thanks
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Monday, August 9th, 2021 AT 4:20 PM

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