Question about 1993 Volvo 940

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Emissions sooty deposit on plugs and black smoke on starting/ regulator and lambda sensor fitted.ECU disconnected and reconnected.

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Yes it does sound like fuel pressure regulater/put a new one on it /they go bad and used is not a good idea /also try unplugging air mass meter if is bosch with it running if its better replace it

Posted on Aug 26, 2008

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