Tach Signal

[lexus082]

I am trying to find out where the tach signal is created/generated? Does it come from the ignition coils?

[UCF3]

I don't think so. I believe it's getting a signal from the Cam Shaft, but I might be mistaken.

[lexus082]

Figured out it comes of igniter #1. So I got the tach speed off of that (basically inspecting the condition of the wires). After I found that tach signal to be correct and the one at the diagnostic port next to the engine, I swapped out guage clusters and found that the tachometer was displaying the wrong rpm's. At 700 rpms the tach was showing 250-500 rpms.

Now I just have a misfire to resolve. :cries: Damn Misfire :chairshot:

[jzz30]

if you change that coil your misfire will probably be solved and your tach will work again!