When I start my car and let it warm up, sometimes I come out to it idling rough. It seems to happen once the engine begins to warm up. If I press the accelorator to the floor the engine rpms up and smooths out for a minute then goes back to rough idle, it also smooths out if I shut the engine off and restart it. Also when I try to accelorate it hesitates but if I put the accelorator to the floor the trans downshifts and the engine usually backfires and regains power and accelorates as it should. I have recently had the fuel pump and filter changed. I thought this would take care of the problem but it hasn't, it seems to be happening more frequently.
Saturday, February 18th, 2012 AT 6:12 PM