1999 Chevy Tahoe number6 misfire

Tiny
TBONEAUSTIN
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 131,000 MILES
I have changed the rotor cap plug wires fuel injector checked the compression its at 158 to 160 on 3 diffrent ones. I have had the ignition moduel tested it tested fine ignition coil tested at 5.7 ohms so what else is left after I did the injectors the service engine light was still on still telling me cylender six misfire, any ideas
Sunday, January 18th, 2009 AT 6:47 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check no.6 compression and injector.

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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Sunday, January 18th, 2009 AT 6:50 PM

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