2002 Chevy Trailblazer misfire

Tiny
YIOTTA63
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 89,000 MILES
We tried coils, plugs, injectors. Truck had a code of misfire #1 cyl. I installed the #1 injector and now reads random misfire, what gives?
Thursday, December 3rd, 2009 AT 9:07 AM

1 Reply

Tiny
SWILLIAMS
  • MECHANIC
  • 597 POSTS
Check the cap/rotor for carbon tracking. The flat caps are real bad for burning through and causing random misses.
What does the fuel pressure read? Low fuel pressure can also cause random miss.
I assume you replaced the entire CPI unit? If so was it a new unit or a used one?
Any vacuum leaks?
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Sunday, December 6th, 2009 AT 12:06 PM

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