I have the same or simmilar issue with my 1991 240, it's got a DOHC though, but the cause might be the same, I don't know exactly what is wrong, but it doesn't seem to affect driving, just when you put the clutch in the idle almost dies, I was told it might have something to do with the Coolant temperature sensor, but I haven't checked into it...I would like to find out what is causing this too!sunnydet90 said: