Originally posted by 2500cc:
Light is not on but the guy I bought it from said it might need new OXY sensor but he wasn't sure. Also, engine temperature needle is always on normal. Car can sit all night here in still cold chicago nights and it will still show like its warm but its not, I can tell by cold air when I try to use heat. So maybe dashborad is malfunctioning a little, who knows. The guy installed white guages on the car, so he might have messed something up and it doesn't show the light on. I'll check at autozone and will codes if any.

Should I move ahead with cold air intake?



One of the first rules of troubleshooting is that you fix what you know is wrong and the re-evaluate. Get the code checked and if indeed you do need an oxygen sensor, replace it and see what you have.

From what you are describing, if clearing you CEL light doesn't resolve it, I would suspcet that it is either an ignition missfire (plugs and/or wires) or that it is running lean under load (oxygen sensor?, plugged fuel filter, weak fuel pump, dirty injsetors).

Sometimes it is also wise to catch up on maintenance before going too deep in diagnosis. If you know that it is overdue for a fuel filter, plugs, and injector cleaning, it is better to do it now rather than later. You don't need your diagnosis being messed up with deferred maintenance.

Jim Johnson 98 SVT 03 Escape Limited