So here's latest on my last post entitled: "Probably wasting your time"-(and thanks to all who replied.)
OK>> Latest> Replaced (at a Volvo repair shop) knock sensor, and ignition control module; replaced (again) idle air control valve, (first new one was defective) Re-adjusted throttle plate. Replaced ignition ECU (used)
Results= Emptied another $442.31 out of my pocket. Same symptons still exist, maybe a little "lighter" (not counting my pockets).
Next step-try another ignition ECU (no charge)--then if necessary (so to speak)remove transmission to inspect something that goes over and around the flywheel (flex plate?) that you can see completely only by removing the trans and could affect timing. Forseen $$$?-- if that ring around the flywheel has to be replaced, $650, parts and labor. If no parts needed, labor still about $400 to R&R trans.
My "final decision", if it comes to it: 2 pounds C4-------
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