I spoke too soon. When I started the car earlier to test the aftermarket tach (Faze Competition EL), I only started it for a few seconds just to make sure the needle moved...and the needle moved but when I started the car the second time tonite, the needle would jump up for about 5 seconds to about 2K rpm then drop back down to 0. I thought maybe I blew something but the same thing happens everytime I start. Any other ideas?GenIIIMrDuece said:its black i belive... otherwise its the black wire on the ignitor.
RickyB said:There is a tach output terminal on the MSD 6 series units suitable for driving most aftermarket tachometers.
Which explains Flyboy's comments and why the aftermarket tach needle doesn't function properly when I attached it to the black wire behind the gauge cluster...mike brinlee said:I beleive the reason you need the addaptor is toyota uses a 20 volt square wave signal to drive the stock tach and most aftermarket tachs use a 12 volt square wave..
Your after market tach should work fine with the msd output but not the toyota output..
hope this makes sence
we got rid of the stock ignitor when we intalled the Nemesis.....I still don't have the dang thing connected. I tried connecting the aftermarket tach back to the MSD ignition tach output terminal and now the needle doesnt move at all.....GenIIIMrDuece said:or oyu can go off the black wire on the ignitor like i said. but yes you need a tach adapter to run an aftermarket ignition....that will still use the stock ignitor...