ivanuke Posted February 4, 2020 Share Posted February 4, 2020 I have an 05 CH with a 427 Aset AC. When truck leaves the yard i have been hearing the exhaust have a chatter sound when going low speeds. Driver hasnt complained about power loss or anything. No exhaust leaks found, It sounds as if the fuel is not being delivered properly. Best way I can describe it is like a muscle car with a huge cam exahust sound. Fuel filter just recently replaced. Any ideas? Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/60823-aset-ac-exhaust-chatter/ Share on other sites More sharing options...
Mack Technician Posted February 5, 2020 Share Posted February 5, 2020 Early sign of a camshaft failure? Check valve clearances to see if any are opening up. Quote Link to comment https://www.bigmacktrucks.com/topic/60823-aset-ac-exhaust-chatter/#findComment-441974 Share on other sites More sharing options...
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