I just noticed a weird Idling issue. At a redlight, stop sign, etc, the car will idle at 500-1000rpms... Like back and forth... It sounds like its going to die, but right before it does, it kicks back up to 1000-1200rpms. It doesn't do it at initial start up. Even if i let it sit for a while, at idle. Any ideas as to what causes this and how to repair it?
It's an 86 Mustang gt/lx. Basically stock, The only engine modification is a fender mount intake. Only has 73,000 miles on it. Any ideas? Thanks guys.
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