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Old 10-23-2006, 12:48 PM   #1
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Join Date: Jun 2002
Posts: 114
Tachometer instability

Over the last several months my Tach has been changing over a 1500 rpm range. This was even more pronounced after we changed the plug wires two weeks ago. I found that I could change the reading just by moving the pickup coil around the #5 plug wire. I moved the pickup coil to plug wire #1 and inserted a 1/4 inch ceramic insulator in the coil/core which held the wire core tightly in place. The insulator is about 1 1/2 inches long and sticks out of the sensor core on both sides. I taped the ceramic to the spark plug wire so it would not move. Solid and correct tach readings have resulted.
Howard Lefkowitz is offline   Reply With Quote

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