Engine Performance problem
2000 Ford Focus 4 cyl Front Wheel Drive Manual 165000 miles
Started when it was cold outside and happens more often then. When I start the car it doesn't hold a consistent idle. It will surge up a couple of times and eventually, within a couple of minutes, the idle will drop so low it usually stalls. When I drive the car it is perfect, no problems. After it is warmed up the idle will usually rev up when I come to a stop. I pull up to a light, stop, put it in nuetral and the engine will rev up. The only way to get it to stop is to put it in gear and let the clutch out a little. This will usually drop the idle back down and then it will idle fine. I put new plugs and wires on it, one of the wires was arking to the positive battery lead. I have had the ignition system flushed, although I am not sold that it really does anything. I have checked the plugs several times and they look good. There are no warning lights and the check engine light never comes on. Can I still pull codes off it if the light never comes on?
Monday, March 16th, 2009 AT 7:45 PM