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Engine Tachometer Issues
My engine tach is reading erratically at idle stays around 11-1200 the shops OBD reader reads 800 at Idle and normal RPM. When accelerator is pushed the tach fluxgates and when driving and I let off the peddle it seems to settle around the correct RPM for a few seconds until accelerator is pressed again.
Does anyone have a wiring diagram showing this? Where is its sensor located? Is it separate system? The engine and trans operate normally so i don’t think its sending control modules the erratic readings.
2004 Monoco Caymen 34PDD, Roadmaster chassie R4R, 300 HP ISB Cummins w/ 5 speed Allison trans.
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2004 Monaco Cayman 34PDD
300 HP Cummind , Allison 5 speed
pulling 2015 Jeep Cherokee Trailhawk
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Linear Mode
