I'm desperate and broke at this point. I have a 1991 940Turbo volvo and I have had nothing but problems for the past 7 months. First, had trouble starting and one garage replaced the fule pump, did not fix and the distributer was replced as well as the throttle positioning sensor. That seemed to fix that problem a lot of $$$ later. One week later the car would not hold an idle and the fuel regulator valve was replaced. Then immediately following that the check engine light came on which indicated a knock sensor problem which I eventually replaced myself and the car ran great for 2 days. It is not falling on its face. No check engine light, no pick up, difficult idle at times. Any help would be appreciated....very frustrating!

Probably unrelated but at the same time the overdrive arrow is staying on and will not engage when the button is pressed.