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This car has had the batt, rotor cap, plug and coil wires replaced, spark plugs, also fuel pressure regulator, fuel filter, air cleaner, and vacuum hoses. All with the over-priced and much vaunted Volvo parts direct from the dealer. When it is cold it runs very rough and backfires and does not want to get under-way without a lot of coaxing. After 5 or so minutes of driving it will smooth out and run like a champ. Compression test and fuel pressure checks O.K. It is better than it was but is still not right. 121000 mi. Anyone have any ideas?
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