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05-17-2016
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#18 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,709
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Re: Low RPMs bucking
The sootiness of the plugs is a result of the lean condition the ECM is "seeing" so it's adding more fuel where it really doesn't need it. The O2 sensor must be broadcasting a lean condition which could be a result of a vacuum leak/exhaust leak bringing fresh air past the O2 and therefore it's reporting a "false" lean.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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