C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old May 11, 2002 | 10:52 PM
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Default black smoke

I have been told by more than one person that when I get on it, my car smokes quite a bit. I have also seen this in the rear view. The car is a stock LT1 with 62k on it. The car also seems to run great, but the smoke worries me a bit. Also when the car idles, it smells like it is running rich, or the previous owner gutted the cats.
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Old May 11, 2002 | 10:53 PM
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Black = Fuel

Sounds like you're running rich. :)
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Old May 11, 2002 | 10:55 PM
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Default Re: black smoke (C4Cvette)

my thoughts exactly, now how to fix it. Fuel pressure? It also has the stock regulator.
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Old May 12, 2002 | 10:22 AM
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Default Re: black smoke (C4Cvette)

ttt
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Old May 12, 2002 | 10:30 AM
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Default Re: black smoke (C4Cvette)

The first step is check to see if any codes have been set. It could be that the O2 sensor(s) are bad sending a lean signal in closed loop to the ECM causing it to increase fuel. There are several other possibilities tho. Rather than throwing parts at it, check for codes first. :yesnod:
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