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After replacing the head gaskets, runs fine for about an hour or so of driving then acts like it runs out of gas?

Tiny
DOUG STATHAM
  • MEMBER
  • 1997 CHEVROLET LUMINA
  • 3.1L
  • V6
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I changed the head gaskets in it. Idles and runs fine until an hour or so of driving then acts like it runs out of gas restart it and it runs fine for a little bit then again can stop it will idle all day new fuel filter. Does not overheat.
Monday, June 19th, 2023 AT 7:46 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,913 POSTS
Hi,

Have you checked the fuel pressure to see if it is within spec? It sounds like the pressure is low, but it can idle, but when it's under a load, the pump can't keep up.

If you haven't, that is where I recommend starting. Here is a link that explains how to check the pressure:

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

If you look below, I attached the manufacturer's pressure specifications.

Let me know what you find.

Joe

See pic below.
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Monday, June 19th, 2023 AT 10:19 PM

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