Well I have an 03 saab 9-3 2.0T and I am gettin misfire reads from the diagnostic test. First time I replaced the coil and that seemed to fix the misfire but a month later it started misfiring again so I ran the test again and it came back as upstream o2 sensor was bad so I replaced it but it took me a couple of months and now it says that I have a misfire again I was wondering what could could be the core problem for this another words what could be causing these problems if it could be and o2 sensor that hascaused the coils to go bad
have the same problem?
Saturday, February 5th, 2011 AT 4:31 PM
DI U REPLACE SPARK PLUGS & CLEAN INJECTOR, POWER FLUSH NOT STORE BOUGHT CAN OR BOTTLE CLEANERS, PLUS CHECK FUEL PRESSURE & CHECK FOR VACUUM LEAKS, CHECK & POST BACK.