I have a 1991 318is that is currently running very poorly. At first cold start up it runs fairly nice but the the more it warms up the worse it runs. It starts to miss at idle and misses in certain areas through out the rpm range when trying to drive it. If anyone has any ideas I'd love to hear them. I need to know what to test and how to test it. I consider myself a fairly good mechanic, but I'm new to BMW's. The check engine light isn't on, and I have scanned the computer which didn't turn up any codes.
I need some more help guys. I have tested fuel pressure, tested idle control valve, replaced temp sensor, and fix one vacuum leak. The car still runs very rough at idle and if you floor it. Could it maybe be a bad throttle valve switch, and does anyone know how to test it?
I need some more help guys. I have tested fuel pressure, tested idle control valve, replaced temp sensor, and fix one vacuum leak. The car still runs very rough at idle and if you floor it. Could it maybe be a bad throttle valve switch, and does anyone know how to test it?
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