Engine Knocking Noise From Carbon Buildup on Chrysler New Yorker

Carbon buildup on the top of the piston is common. Over time this can lead to symptoms varying from light ticking to knocking noises. Performing a fuel injector cleaning procedure can often help the condition by removing some of the piston top deposits.

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4 model years affected: 1990, 1991, 1992, 1993
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