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

1997 CHEVROLET LUMINA
150,000 MILES • 3.1L • V6 • 2WD • AUTOMATIC
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DOUG STATHAM
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  • 1 POST
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.
Jun 19, 2023 at 7:46 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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

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Jun 19, 2023 at 10:19 PM
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