Stalling out, sputtering

Tiny
JCROUCH18
  • MEMBER
  • 1991 CHEVROLET S-10
  • 4.3L
  • V6
  • RWD
  • AUTOMATIC
  • 200,000 MILES
The problem is getting worse every week. When I'm going down the road the truck acts as if it is running out of gas and starts sputtering. When I'm at a red-light/ stop sign the truck stalls out as if it were running out of gas, so I accelerate and after its done sputtering it goes back to normal. I just changed the fuel filter on it and that didn't make it run any better. Also started putting mid-grade in it and it seemed to be better the first few days and now it is acting like it was before. It also drinks a lot of gas if that helps diagnose the problem in anyway. PLEASE HELP!
Wednesday, May 21st, 2014 AT 5:21 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
There are a number of things that can cause this, but we need to start with checking the fuel pressure.

You should have what is called a throttle body injection TBI system.

Basically, this is fuel injection and carburation combined. So, there are injectors in the throttle body that inject the fuel into the intake where it is mixed with the air, and it creates the proper air/fuel mixture.

Here is a guide that will help with this:

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

Also, below I am attaching the info from the manual on how to run this test so let's start with fuel pressure and we can go from there.

Thanks
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Tuesday, April 19th, 2022 AT 5:11 PM

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