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"Radio suppression relay less than 1 year old, german brand (can't recall name) seems good, swapped with spare no difference."
Mike,
"Seems good" and "swapped with spare" still leave the possibility of a failing RSR coil ground connection. I speak from experience (see this "Geezer Stumped" post and scan the entire thread). If the coil ground path is bad, the RSR is dead. That means no power to the Fuel Injectors and a dead motor.
Also see THIS THREAD , for a photo of the offending ground "tab". On your Regina car, this tab is bolted to the right side inner fender panel, tucked up out of sight behind the wiring bundles just aft of the right headlight.
If the problem persists after thoroughly cleaning the ground tabs and fender panel contact area, I would by-pass the RSR completely with a jumper connecting the 2 larger wires (RED an GREEN-RED) in the RSR harness plug. Or, as a relatively quick diagnostic, just try the RSR bypass to see if the problem goes away.
NOTE: This jumper will NOT drain the battery, because there is no current thru the jumpered RSR path until the ECU activates it for normal injector operation. (My RSR has been bypassed this way for over 2 years now with no problems.)
Based on my experience, a ground tab problem CAN cause intermittent start/run failures.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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