My 93 850 stalled at a light a couple of weeks ago & has been getting less than average fuel mileage. Yesterday it stalled again and while it would always restart, it was very difficult to keep running. Engine surges at constant speed and dies when slowing down/stopping. It seems happy only under hard acceleration. Check engine light is on & the car is running very RICH with plenty of black smoke from the exhaust. I think the next step is to read the codes, but which socket to plug into & where can I get a list of the codes? Any advice?
DG
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