hard start when cold or engine sits?

2001 CHEVROLET S-10

155,585 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC

CAR GUY 15

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I have a hard start when cold or engine sits for more than 4 hours, blinking check engine light at highway speeds only, hesitation most of the time, a finicky fuel gauge, and a computer that will randomly reset itself every once and a while.

Jan 18, 2015 at 8:31 AM

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HMAC300

AUTOMOTIVE REPAIR CONTRIBUTOR
48,601 POSTS

scan for codes and check fuel pressure with a gauge. auto parts rent it.

Jan 18, 2015 at 10:46 AM

STRAILER

AUTOMOTIVE REPAIR CONTRIBUTOR
54,178 POSTS

I agree with HMAC300, it sounds like you have a weak fuel pump. Here is how to check the pressure guide.

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

the fuel pressure should be between 48 and 52 psi. HEre is how to change the pump out which is a common failure with these trucks. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Oct 17, 2024 at 6:24 PM