Backfiring

2000 CHEVROLET BLAZER
180,478 MILES • 4.3L • 6 CYL • 2WD • AUTOMATIC
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ARCTICKITTEN1212
  • MEMBER
  • 1 POST
I put new plugs in my vehicle, I got it back in time and it backfires. wires are on right every thing looks good. I want to know what it could be?
Oct 24, 2017 at 12:52 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
What do you mean when you say "got it back in time"? They do not have adjustable timing. The distributor moves only to adjust the crank sensor/cam sensor correlation to zero degrees. If you rotated it to adjust the timing it is possible that the rotor is actually sending spark to the wrong post giving you a backfire.

Do you have a scan tool to adjust the system back to zero degrees?
Oct 24, 2017 at 1:54 PM
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