# S10/Jimmy/Blazer/Sonoma Fuel Pump Check Valve Question

**URL:** <https://forums.speedlife.net/t/s10-jimmy-blazer-sonoma-fuel-pump-check-valve-question/274861>\
**Category:** NYSpeed Automotive\
**Created:** [August 28, 2017, 10:50pm UTC](https://forums.speedlife.net/t/s10-jimmy-blazer-sonoma-fuel-pump-check-valve-question/274861 "2017-08-28T22:50:44Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![ubengineering](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ubengineering/32/5171_2.png) [@ubengineering](https://forums.speedlife.net/u/ubengineering)\
**Post date:** [August 28, 2017, 10:50pm UTC](https://forums.speedlife.net/t/s10-jimmy-blazer-sonoma-fuel-pump-check-valve-question/274861/1 "2017-08-28T22:50:44Z")

</div>

Hey fellas quick question,

My S10 (4.3L) I use occasionally takes about 3-5 seconds to start when cold (This may not seem like a long time but a car should take 1-2). So I threw a fuel pressure gage on it and the pressure drops at the rail from 55PSI to 0 within 10 seconds. After doing some research apparently GM is known for their shitty fucking fuel pumps (specifically the check valves failing) allowing fuel to return to the tank hence hard starting.

At first I was going to cut a hole in the bed, then I decided to lift the bed since it’s rust free to replace the fuel pump. But before I do that, has anyone installed a one way check valve outside the tank such as:

> **[Dorman Fuel check valve kit 800-195 - Read Reviews on Dorman #800-195](https://www.autozone.com/fittings-and-hose-line-connectors/check-valve/dorman-fuel-check-valve-kit/347344_0_0)**
>
> Shop for Dorman Fuel check valve kit 800-195 with confidence at AutoZone.com. Parts are just part of what we do. Get yours online today and pick up in store.

It would be a lot easier than replacing a pump/sending unit for 200$ that’s working fine.

Thoughts?