Low fuel pressure?

Tiny
RODPOD
  • MEMBER
  • 2000 GMC SIERRA
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
On a cold start it will crank up then go shut off. Like it's not getting enough fuel. Can hold the accelerator down when it cranks up for a few seconds and after that it will stay running. Every time after that initial start it will crank up and run fine.
Sunday, September 22nd, 2024 AT 7:35 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

The fuel pressure could be dropping off. Here is what I need you to try and let me know the results.

1) Turn the key from off to the run position (engine off) and count to 5
2) Turn the key off and repeat step 1 a total of 5 times.
3) On the 6th time, see if it starts normally.

Let me know the results. Also, if you have access to a live data scan tool, check what the coolant temperature sensor is indicating before starting it cold.

Let me know.

Joe
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Sunday, September 22nd, 2024 AT 8:17 PM

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