Get a bottle of STP complete fuel system cleaner, it will clean up any carbon build up in your fuel system. I use a bottle once a year works great. It doesn't contain any alcohol so it won't corrode or hurt your fuel injectors like some of the other cleaners out there. BTW 110 octane racing fuel is expensive and can damage your converter...
carbon buildup?
i ran at the strip tonight and my friend said while i was making my pass i had black smoke coming out of my tailpipe when i would shift. he's pretty knowledgable about cars and said it was probably carbon buildup. is this the reason or could there be other alternatives? he also told me to put some 110 octane race fuel in and it would burn off the deposits. any help is appreciated.
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Maybe a new 02 sensor might help. If your car has over 60k miles it may need to be replaced...
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