I have a 1992 940 nonturbo. When I am driving up a hill the car will lose power. I doesn't die it just won't go over 10 miles an hour then tries to overheat. If I stop and restart the car sometimes it will run fine and some times it won't. It doesn't have any error codes and the gas tank is 3/4 full? Any help will be greatly appreciated.

 

What color is the oil?
Does the check enigne light come on?
Does the engine rev and not move?

 

The oil is fine.
No the check engine light does not come on.
It'll move just has very little power. And if you continue to try to go it will get hot.

 

check to see that your exhaust is free. I am thinking that the catalytic converter is full of broken pieces and when you go up a hill they go back and clog the exhaust pipe. just an idea. The fact that it happens when you go up a hill makes me think this could be the problem. How very strange! Please let us know what you find. Also check accordian looking hose that runs from throttle body to airmass sensor for holes.

 

Yes I agree check the Cat Converter.

 

It was the catylac converter. Replaced it and it has worked fine ever since. Thanks for your help

 

Congrats on getting it fixed.