I have a new Autometer Tach #6806 on my Cummins 12Valve in the Grizzly.This is a crank trigger tach...
The tach reads very close at idle speed and just gets worse from there.Does not go over 1500 rpm .Its just plain lazy...
I have contacted the techs at Autometer but they have stopped answering me...
So...first round I had four posts in the balancer 1/4x1/4..Tach read as it does now..Autometer said to change it to 4 machined slots.I milled (4) .500 wide x .250 slots in the balancer...This made it worse.I then put .500 keystock in the slots and this gave me .250 high towers.Tach is now back to its normal bad behavior.
I then replaced the crank sensor and this did not help...I pulled the dash apart today to see if I somehow crossed the two sensor wires when I spliced them together but I have them correct...
Is one of the wires on the sensor a ground
Anyone have any ideas...This tach is north of $400 US and has not worked since day one...