10-01-2001, 07:13 PM
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| Senior Member
Join Date: Jan 2001 Location: Rio Rico, AZ 85648
Posts: 1,116
Car: 1989 IROC-1 Engine: L98 Transmission: 700r4 | Tachometer Filter?
I've been having a problem that is been pretty hard to nail down.
My tachometer shows about double of what the actual engine speed is. It has done this before, but I was able to fix it by changing the ignition module.
I changed the module, coil and capacitor and I still have the same problem.
I had the car for about 6 months before this happened. There is a tachometer filter, but it has never been hooked up.
Could this be the problem? How would I wire it in?
The tachometer filter is sitting there on the firewall, with the wires looped around plugged into itself.
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