backfired and will not start

1997 CHEVROLET 1500
220,000 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
Avatar
DEBBIE1401
  • MEMBER
  • 5 POSTS
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.
Feb 13, 2020 at 11:25 PM
Advertisement
Avatar
SCGRANTURISMO
  • ✓Experienced 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
Feb 13, 2020 at 11:55 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle