5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
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
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.
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