backfires

2007 CHEVROLET SILVERADO
172,000 MILES • 4.3L • 6 CYL • 2WD
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MIGUEL GLORIA
  • MEMBER
  • 1 POST
Shuts off like someone turns it off. It backfires under load or when idling.
May 10, 2016 at 8:01 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.
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 48,601 POSTS
check for a vacuum leak scan for codes and check fuel pressure with a gauge first, auto parts rent it.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
May 11, 2016 at 7:04 AM
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RENEE L
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 1,260 POSTS
Here is a link to an article that features written step by step instructions and pictures explaining how to do the scan yourself, also I have included a link to our YouTube channel with a how to video on code scanning. Most scanners are inexpensive to purchase, you can purchase one from Amazon.com. Once you have the codes please get back to us so that we can further assist you. Thank you for visiting 2CarPros.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
https://youtu.be/YV3TRZwer8k
May 11, 2016 at 4:06 PM