thinking tht maybe the throttle position sensor could be at fault. any check engine light? does the CEL come on when you first start the car at all? if not, the bulb may be burned out and would otherwise point you to a problem.
if the tps is bad, the bog would come from the ecu not knowing how far the throttle was open. and either dumping too much fuel or not enough.
i'm sure there must be a test procedure for the tps.. using a voltmeter.. anyone can help that has an FSM? |