Starts revs to around 2,000 RPMs then shuts off

1997 CHEVROLET SILVERADO

200,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC

J.WILL25

MEMBER
1 POST

I changed my MAF sensor and all four 02 sensors. it ran fine for a few weeks now when I start it it'll rev to around 2,000 RPMs then shuts off. I can hear the fuel pump kick on but I don't know if it's the fuel filter, the fuel regulator. what can be causing the issue?

Jun 11, 2021 at 6:45 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Hi,

Does the vehicle restart after stalling or do you have to wait?

As far as a fuel issue, an extremely lean fuel mixture can cause a high engine rpm. So, I would start by testing the fuel pump pressure and regulator. It really isn't too hard to do.

Here is a link that explains in general how to do it. You will need a fuel pressure gauge, but most parts stores will lend one to you.

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

If you look at the pics below, I included a pic showing where the fuel pressure gauge attaches and the manufacturer's specs for pressure.

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.

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Professional Diagram for 2CarPros Members
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Jun 12, 2021 at 2:26 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.