When I gradually push on the throttle it will hesitate then it will shut off?

Tiny
SHANE BILLMAN
  • MEMBER
  • 1995 CHEVROLET BLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 90,000 MILES
When it's at an idle it'll run but as soon as you gradually push on the throttle it'll hesitate then I'll go off. I replaced all the sensors and replace the spider fuel pump three times, filter twice injectors. What else could it be?
Saturday, May 8th, 2021 AT 12:00 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

Have you checked for diagnostic trouble codes? Also, have you checked for engine vacuum leaks and fuel pump pressure?

First, here is a quick video showing how to scan the vehicle:

https://youtu.be/InIlnsjOVFA

I realize most people don't own a scanner, but oftentimes a parts store will lend or rent one to you.

Next, make sure the fuel pressure isn't too high or too low. Here is a link that shows in general how to check fuel pressure:

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

Here is a link to help locate an engine vacuum leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

I don't know what all has been checked so far. Sitting here, I'm even questioning if a catalytic converter could be plugged. Take a look through this link and let me know if it mirrors what you are experiencing:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

Let me know what all has been checked. If the things above haven't, that is where I would start.

Take care,

Joe
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Saturday, May 8th, 2021 AT 9:32 PM

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