I bought a 2000 E39 and it has a bunch of issues. I got it cheap and really wanted a project car with no dents. It had a lot of engine codes that went away with new injectors, coil packs, and plugs. Still need to replace the thermostat and possibly the water pump. I had it running pretty good and decided to straighten the rear p/s tire enough to drive it to an alignment rack. After I was done with the rear tire and put the car back on the ground it would not crank. Looked into a lot of "no crank, no start" videos and thought my ring antenna had failed. Replaced it, no change. So, I went to remove the EWS and the DME to send them out to see if they were my problem. After I took out the EWS I thought I'd look at the circuit board to see if there were any visible burn marks on it. I found none and thought I'd just plug it in outside of the box to see what would happen. It started right up! I just chalked it up to a bad connection and put it all back together. It continued to start until I let it cool while I was changing the oil. Then the same thing, no crank. Unplug the EWS and plug it in, starts just fine. Cleaned all the contact and put a little dielectric grease on it, no change. Does anyone know what is going on here? Am I resetting it or something when I unplug it? I haven't found any answers to this anywhere.
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