Hi all.. My car is recently producing a large amount of black smoke ... And engine (quite shaky) just stop a low speed ( at a red light or so) specially when I turn on the AC. A friend told me that it could be a failure in the Idle speed valve ...am not sure ... Any help shall be greatly appreciated ...also ideas where to buy parts if needed
Cars & Trucks - Rolls Royce - Silver Spur - 1991 Rolls Royce Rolls Royce Silver Spur
Answers & Comments
Black smoke is usually excess fuel.
The problem could be faulty fuel injectors or the fuel pressure regulator. Or a restriction in the air intake. Or a faulty O2 sensor.
If you remove the spark plugs you may find the cylinder or cylinders with too much fuel.
If that is the case, you would need to test the injectors and the fuel system.
Thanks a lot for the help
Black smoke cause by weak ignition coil dirty leaking fuel injectors.could bad sensor like bad oxygen sensor.clogged air filter.intake manifold due to bad valves make engine run rich.
Thanks a lot