Engine will not stay running?

Tiny
DOUGLAS WILLIAMS2
  • MEMBER
  • 1999 GMC SIERRA
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 190,000 MILES
Starts awesome runs about 2-3 seconds and shuts off. What direction to start troubleshooting?
Saturday, March 25th, 2023 AT 9:55 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,443 POSTS
Hi,

Does the check engine light stay on while the engine is running? If so, the computer should be scanned first for diagnostic trouble codes.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Since it stalls shortly after starting, it could be related to the fuel pressure also. That would likely be the next thing I check. Here is a link that explains how it's done.

Start with this and let me know what is found.

Take care,

Joe
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Saturday, March 25th, 2023 AT 11:05 PM

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