Backfired and will not start

DEBBIE1401

MEMBER
1997 CHEVROLET 1500
4.3L
6 CYL
2WD
AUTOMATIC
220,000 MILES

I was going down the street all the sudden truck shut off started it back up. Rpm's jumped 3,000 stayed there. I turned it off, it backfired, and now it wont start at all.

Friday, February 14th, 2020 AT 7:25 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

This sounds like you have a major intake/vacuum leak going on. Any time the engine RPM's start "searching" or go high at idle and then hang there, a vacuum leak is the culprit 9 times out of 10. Here is a link to a guide below explaining how to find a vacuum leak. Please pay special attention to the intake manifold portion of the guide.

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

Please go through this guide and get back to us with what you find out.

Thanks,
Alex
2CarPros