I hope this is in the right place, ive got a 2000 3.8 manual mustang, the engine was rebuild 2 years ago, 6 months ago rpms started to stick very high, and after a few miles it stalled, turned back on and drove homse, the mechanic told me he checked the computer and cables and it ran good for 3 months, now is doing it again, but it doesn't do it all the time, just when stuck in traffic, intake has been cleaned throughly, has anyone had this experience?
Appreciate any help!