BACKFIRE ON DECEL

  • Tiny
  • 82blzrman
  • Chevrolet Blazer

'82 Chevy K-blazer 350cid v8 4speed manual trans.
100k miles
Mods: headers/duel exhaust/MSD ignition/edelbrock intake-nonEGR
Problem: idles fine, accels fine, backfire when decel in gear

Friday, July 6th, 2007 AT 8:05 AM

1 Answer

  • Tiny
  • merlin2021
  • Expert
  • 17,583 posts

2 things will cuase it. 1.) Vacuum or mechanical advance not working.
2.) If you still have converters with air tubes and check valve on the manifild, one of the check valvles is NG, air tube has holes.

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Friday, July 6th, 2007 AT 3:48 PM

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