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#1
07-06-2004, 06:56 PM
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Black smoke on start up and accelleration
What is the problem generally if my 380 sl blows out black smoke on start up and also when i accellerate? It has new plugs and wires. Thanks Chris
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Chris 
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#3
07-07-2004, 01:33 PM
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Cold start valve leaking
Warm-up compensator problem Fuel pressure incorrect Bad fuel injector(s) Did any of the plugs look black or sooty? What year is the car?
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Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#6
07-08-2004, 08:09 AM
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The later 380's had an acceleration enrichment device. I would add that to this list of stuff to check, along with the O2 sensor.
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Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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#8
07-09-2004, 07:07 PM
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Chris, I had similar symptoms and it ended being a clogged inlet filter on the warm up compensator, which also enrichens the mixture on acceleration. The W/U comp sits on the front of the intake manifold with two fuel lines hooked to it. The larger of the two fittings has the filter, with a screen behind it (in the comp) as well. Good luck!
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1983 380SL 1995 C280 1995 S500 coupe 1990 Mazda Miata 2004 Suzuki Hayabusa
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