Quote:
Originally Posted by VolvoFan
Thanks for your reply. I believe that my engine is running too rich from the blackish colour of the exhaust pipe and rich smell of exhaust. The car starts and runs well, both at idle and at cruising speeds.
I removed the spark plugs and found them all consistently darker than the normal grey/brown colour, although they weren't sooty. I also think that the fuel consumption seems slightly higher than usual.
I don't suspect any ignition irregularities, but will check cb points and dwell angle and ignition timing, although the mileage covered since they were checked & set last year, is under 500 miles.
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I expect the manifold pressure sensor has been tampered with over the years , it would be good to get that checked out and set up properly , has the sealed alloy blanking plug been drilled ?