no power

[mrpuffin708]

I have a 90 525 that has some problems. It hesitates really bad and seems to have no power or torque. Also my check engine light comes on when coasting downhill. As soon as a touch the gas it turns off. I dont get any codes besides the no faults found using the stomp test. Thanks in advance

[brettski]

Try disconnecting your Air Flow Sensor and see if there is any difference in the performance. I had similar issues (particularly when cold) without the coastig warning light. By disconnecting my AFS (AMS) the Engine Management goes into a default bypass mode and improves the performance. If you do get a positive result by doing this, try removing the sensor and cleaning it with brake cleaner or the specialist Air Flow Sensor cleaning product. Your might be lucky and fix the problem, otherwise you are probably looking at buying a replacement unit.
Good Luck

[mrpuffin708]

I have cleaned the air flow sensor recently as well ar rewired the sensor. Before that i was gettin a code from it but not now. And i forgot to add that i can smell fuel from the exhaust

[brettski]

I'd still try disconnecting it and see if anything changes. If its feeding bogus information to the ECU the air fuel mix will be out.

[mrpuffin708]

I will try that as soon as i get back to my car. Is it gonna make an instant differance or do i need to drive it a little to see?

[mrpuffin708]

Ok. I disconnected the air flow sensor and the car just died. I assume that is bad. Any thing else i could try before i spend money?

[brettski]

Did you do it with the car running, or before you started it?

[mrpuffin708]

I did it with the car running. I started it that way and it took a lot of cranking. I assume that isnt good