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The Tab for the Flywheel Position Sensor Broke Off (archive)
[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]
Posted by Mac Jacob on December 10, 2001 at 21:10:26:

In Reply to: 528e, Sudden Loss of all Engine Power posted by Mac Jacob on December 09, 2001 at 22:25:54:

The problem has been traced to a broken tab on the flywheel that is used as a reference by the position sensor.

Does anyone have any suggestions as to what might cause an e28 528e to suddenly lose almost all of its power? The car normally runs perfectly. When it happens, the engine keeps running for a while, buy only at about 100 rpm, and it sounds like it is running on one or two cylinders. No power to move at all. Smells like fuel out the tailpipe, so it has at least some gas. I've swapped the coil, with no luck. Swapped fuel pump and main relays with no luck. I have what looks like a good spark when I connect a spare sparkplug to one of the wires and ground it to the engine block (I use jumper cables to ground it and don't try to hold it in my hands).

This has happened three times in the last few days, sometimes it will start running well if I try again later, but right now it won't run.




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