Shuts off when it gets warm

1991 CHEVROLET LUMINA
138,000 MILES • 3.1L • 6 CYL • 2WD • AUTOMATIC
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PETO
  • MEMBER
  • 4 POSTS
Driving to work two days in a row now it gets warm and then it shuts off. it acts like it wants to start if I know I'm getting spark oh, but it's like I'm not getting enough fuel. I put new fuel tank fuel pump in last night oh, and it did the same thing to me today. Any help would be much appreciated.
Aug 14, 2019 at 11:04 PM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Peto,

Can you measure the fuel pressure when this happens? Just hook up the fuel pressure gauge and tape it to the windshield and see what it does when it stalls.

Here is a diagram of the connection point. Thanks
Image (Click to enlarge)
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Aug 15, 2019 at 8:21 AM
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PETO
  • MEMBER
  • 4 POSTS
I will have to get one tomorrow to be able to test it.
Aug 15, 2019 at 10:00 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Okay. Just let me know what you find. I would like to eliminate fuel but that is what this sounds like and this is the best way to do that. Even when the engine shuts off, you should have pretty constant fuel pressure for a little while.
Aug 15, 2019 at 11:22 AM
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PETO
  • MEMBER
  • 4 POSTS
Okay. It seems like it does it when the engine gets good and warm. Thanks for your assistance.
Aug 15, 2019 at 11:28 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Okay. Again, we need to completely eliminate fuel and we can do that with good pressure. It could still be a regulator but we will get to that later because without good steady pressure, nothing else matters.

I will wait to hear back with the pressure. Thanks
Aug 15, 2019 at 11:36 AM
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PETO
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It is running about 40 to 45 PSI cold. I need to get the pressure tester to not leak before I run it and it gets hot and burn my beard.
Aug 16, 2019 at 12:15 PM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Okay. If that was key on and engine off or just idling. Then that is okay. However, you said that this happens when it gets hot. So yes, we need to make sure this is not leaking so we can see what the pressure does when it shuts off. Thanks for the update. Let me know what you find. Thanks
Aug 17, 2019 at 10:11 AM
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