Desert Driver Posted November 11, 2020 Report Share Posted November 11, 2020 Two years ago I installed a new Stewart Warner Tach (#82163) and it jumped all over the place. Took the car to three different mechanics who worked on the distributor...changed this, added that, lubed it, etc. Nada...except for a bunch of bills. So I called the SW tech dept and was put in touch with a tachometer specialist. Seems the SW tachometer doesn't much care for my HEI distributor and jumps. He said their current production line has a different circuitry to address that issue. The solution to my problem was quite simple: install a 1/2 watt 1000 ohm resistor inline. Voila...no more jumping and rock steady readings! My cost: approx $7.00 for a 100 pack of these resistors (no more Radio Shack, so hello Amazon). If you have a jumper, by all means contact the tach maker's tech support. And if you need a dozen or so of these resistors, contact me! Link to comment Share on other sites More sharing options...
adamderosa Posted November 24, 2020 Report Share Posted November 24, 2020 Excellent! Glad you found a solution and thanks for sharing the information! Link to comment Share on other sites More sharing options...
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