1996 Chevy Blazer misfire

Tiny
NABOSS
  • MEMBER
  • 1996 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 153,000 MILES
My blazer is got a "service engine" light on. Its running like you missing a spark plug. I just replaced spark plugs, spark plug wires and oxygen sensors. It worked for a little bit than goes back to the same problem. Plug in one of those code readers and it said misfire on cylinder 4. It jumped from "misfire on cylinder2" before replacing those parts to "misfire on cylinder 4"after replacing parts. What could be the problem?
Wednesday, May 21st, 2008 AT 3:08 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Recheck the sparkplug wires connection-check the compression and injector for no.4 cyl

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel
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Wednesday, May 21st, 2008 AT 3:21 PM

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