Tach reading low
Not sure where the problem lies. 2002 Itasca Horison, Cummins 300 HP 5.9 ISB, Allison 6 speed transd, Freightliner chassis Normally at 60 MPH the tach reads about 1700-1800 rpm. Noticed yeste...
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One possibility is the tach sensor(prox switch) is missing some of the pulses off of the engine flywheel. Might be loose, miss adjusted or went south.
Freightliner probably installed it and should be able to figure it out.
Freightliner probably installed it and should be able to figure it out.
