So i have a 93 mazda protege with the 1.8L sohc engine. it has a few problems.
One of the problems i want to figure out is; when i first start it up, it idles at 2000 rpms and stays there til it warms up.
When its really cold outside the idle will bounce back and forth from 1500 to 3000 rpms.
I'm just wondering why the idle is so eff'd up? Could it be the throttle pressure sensor? Or the idle sensor? Vacuum leak? I have no idea...
ANY help would be greatly appreciated!!!