2006 Chevrolet Monte Carlo Repair Question
Chevy dirty exhaust
2006 Chevy Monte Carlo V8 Front Wheel Drive Automatic 42,000 miles
i have an 06 monte carlo ss 5.3/ls4 and have noticed a little black residue inside my exhaust pipe tips, is there any concern??, thank you, matt
Could be running rich get it check on a gas analyzer to confirm it. Running rich could be caused by the following a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
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