2001 Ford Mustang Q&A
2001 Ford Mustang Question: Engine speeds up and down.
the deposits at the throttlr plate can cause this kind of issue more than that, the idle air valve is a more common failure. have it check for operation. Roy - mastertech6371
Changed fuel filter, air filter. No luck. Changed plugs and wires. Big improvements at low speed. Still won't get up and go. Could it be a coil or catalytic convertor ? Check engine light is on.