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petervankleeck · 03-19-2019

After reading the tach from the HVAC display, while the tach reads 4K the actual RPMs are 1750. Still very high but less than twice the reading. Anyone know how this disparagement occurs between the tach and engine?

03-19-2019	#7
petervankleeck Join Date: Mar 2019 Location: Manassas, VA Posts: 25	Re: Extremely High Idle After reading the tach from the HVAC display, while the tach reads 4K the actual RPMs are 1750. Still very high but less than twice the reading. Anyone know how this disparagement occurs between the tach and engine?