Carbon buildup at top of piston may cause noise on Dodge Grand Caravan

Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.
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Average mileage: 106,169 (90,000–122,339)
Engine affected: 3.3L V6
5 model years affected: 1992, 1993, 1994, 1995, more2001
9 people reported this problem
3 people shared problem details
1992 Dodge Grand Caravan- 3.3L V690,000
noise has gotten quite loud. nothing done yet. but will try the fuel injector cleaner.
i have loud knocking noises when i drive, i will try the fuel injector cleaner
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