15 FL dd15
Discussion in 'Freightliner Forum' started by Keepontrucking2016, Oct 24, 2019.
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I don't see rpm goes up and down...
but I hear something...AModelCat Thanks this. -
Tach looks pretty steady to me. Not something I'd worry about.
I too hear something though. Sounds like an exhaust leak. Maybe a miss? Kinda hard to tell.mhyn Thanks this. -
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I forgot to mention once the engine warms up you can barely hear it n it plus does it a bit when im loaded climbing hill
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nothing wrong with rpm. the gauge is not accurate plus there can be little up and down of rpm. its acceptable. do valve adjustment and use good fuel.
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Sounds like a stuck open exhaust valve. Take rocker cover off and inspect valve lash.
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mhyn and QUALITYTRUCK Thank this.
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