I have a 2004 chevy trailblazer with 4.2 6 cyl I have changed plugs and coil packs run inj cleaner changed map sensor and still running rough I cleaned throttle body cleaned pcv hose I also checked to be sure coils was aligned and down tight still idles at 500 and turn ac on goes between 3&400 pls help lol not sure wat to do from here
have the same problem?
Monday, July 30th, 2012 AT 5:50 AM
First you need to solve #1 misfire check compression and fuel injector at #1 the. If problem is neither of those post all stored. Codes here. Iac ( idle air control). Coyld be ng.
Monday, July 30th, 2012 AT 10:55 AM
Comp good and checked injector wiped all codes out and drove a few miles till ck eng light was flashing only code was p301 misfire on cyl 1 no other codes and still running rough