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Thanks for the ideas.
The car became progressively harder and harder to start, and then one-day would not start, and has not started. The car does have a checkered past. A local INDY shop replaced the rear main seal 3 times before they got it right. (I can only imagine how much RTV they put on it). They also charged for a replacement flex plate because they said the old one was bent. The bellhousing has a 12" weld across the top, and the firewall has a deep scar where the head banged into it. I think it had front damage and was repaired. After all this, it did run for 9 months before presenting us with the current problem.
The RPM sensor mount was R&R'd with a new one. In speaking with my Volvo Sr Tech friend, he stated that he did have an oscilloscope on it, and there is a signal coming from the sensor. It apperasr to be getting lost soemewhere between the Motronic and the Power Stages, at least that is the current wisdom.
I also thought that maybe the INDY shop forgot to tighten the flex plate bolts, and maybe it has moved out of place. I did look down the hole when the crank position sendor was removed, and tried to wiggle the flex plate. It did not budge, but I could not get much torque on it. When cranking the motor with the starter, the slots just move by too fast to tell anything.
Any other ideas would be greatly appreciated.
Do you know of a source for a new-recycled engine wiring harness?
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