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I did look at and clean distributer cap and rotor. Fould oil leaking past the dist Oring, but decided it was too simple to be the problem. I figure it is difficult to stop high voltage from jumping terminals. I think it is the regina system. I for sure have regina fuel as I replaced the single in tank fuel pump this summer. BTW, a clogged fuel filter will ruin your fuel pump and case no start/ hard start(130000 miles, I bought the car used). The coil is mounted on the lf shock tower and is rectangular, not typ cylinder. The same setup is on my '93 945. I didn't mention but did listen for the fuel pump to come on, and have new filter so I think it safe to put the relay/fuel delivery on the back burner. My wife just said it died once this morning on startup, so I am still concerned the problem is not licked. To check vacuum, just take off suspect ho hoses and finger test for suction while running? Will thee o2 sensor cause these rich running problems. Is there a way to hook up a pc to the ecu and check outputs and function of all the sensors? The Volvo engineers must be able to do that. Rodger on the throttle body cleanup- will get that this weekend. Thanks for responding.
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