Engine Performance problem
2002 Chevy Trailblazer 6 cyl Four Wheel Drive Automatic 150000 miles
engine developed a miss and the service engine soon light came on. The local auto part store scaned the code and said it had a miss fire on cylender #6. I changed the fuel filter, the spark plug on #6 changed the oil and filter and the air filter. And that didn't help.
I changed the coil pack and the plug again. Still no help. I checked the compression and there is between 145 to 155 lbs on all cylenders. I replaced the fuel injector and stilll no help. If you acelrate hard the check engine light flashes, and if you are easing along it stays on solid.I have noticed that the cruise control has quit working and when the heater comes on the miss is more noticable.I have checked for a vacume leak and havn't been able to find one. Any Idea's what to try next? Thank's in advanced
Monday, January 12th, 2009 AT 5:31 PM