BLACK SMOKE FROM THE EXHAUST

1999 OPEL ASTRA
15,000 MILES • 4 CYL • FWD • MANUAL
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HABIB ADAM
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when I start car, sometimes it cracks exessivily before it start. And when it start, it idle roughly (vibrate) and black smoke comes from the muffler during accerelation and idling. please help me to diagnose the problem.
Mar 31, 2016 at 2:25 AM
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MHPAUTOS
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Check fuel pressure it may be excessively high due to a failed fuel pressure regulator, this would account for black smoke (very rich) mixture.
Apr 2, 2016 at 4:18 PM
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HABIB ADAM
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please I have checked the fuel pump and replace the fuel pressure regulator but still the problem is not solve please.
Apr 3, 2016 at 2:03 AM
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MHPAUTOS
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Pull the spark plugs and see if one more at sooted up if only one check for leaking injector
Apr 3, 2016 at 3:23 AM
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HABIB ADAM
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please the engine is an electronic carburetor (not injectors). I have change the spark plugs too. And when I checked and all is sooted (black).
Apr 3, 2016 at 8:23 AM
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STRAILER
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It sounds like the choke is stuck closed, and remove the air filter to check please?
Apr 4, 2016 at 3:08 PM
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