so i have a 2002 sunfire se with the 2.2 ohv. It started a couple days ago with a check engine light. It was an O 2 sensor code so i replaced the upper o2 sensor. Drove fine for about 10 mins and then you could only go to 4k rms then it would get rough and bog out. It progressivly got worse until today. Now when you start it it will idle really rough as soon as you touch the gas it dies out. Ive tried switching back to the old o2 sensor, swaped out plugs, coils, ignition moduel, map sensor, throttle position sensor, and pcm. Checked the timing and it was good. Checked compression it was good. Pulled the fuel line off by the filter and lots of fuel. I am really lost and am just wondering if anyone had any suggestions. Thanks in advance.
Aug 19, 2007 at 8:28 PM