timinthehood
09-11-2010, 05:45 PM
when going about 35mph, or excess of that, and letting the car return to about 900-1000 rpm, the rpm starts jumping from 900/600/900/600, it rattles the whole car back and forth, and then coming to a stop the rpm steadies to idle, is this a vacuum leak or some kind of electronic failure? HELP AND ADVICE NEEDED THANKS