I am new to this sport so i need some help i just built a desert dynamic four seater with a 2004 6 liter cad motor that has 345 hp i am having a problem with my tach i have power to it but i can't get it to read a signal from the motor any ideas i have sent the computer back to fast performance but i can not get it to work so it must be me

thank for any help

I really wish there was an auto grammer and spelling checker on this sight.

I am not trying to be an ars to you. Your post just put me over the top.

holy shiat !!! i am having a hard time not ripping this post to pieces or pices???

Depending on what Tach you have....I have an Autometer you can download the directions....I have a V6 in my car and you need to cut one of the wires so it can read it correctly....hope this helps.

did the tach come w/ instructions? i'm not an expert but maybe i or someone can help you figure it out if you post a picture of it

On my Autometer monster tach I cut the brown wire for v6

First off, you need to know what wire from the computer will control the tach. I dont know about your motor, but on my LS1, I had to set the tack on the 4 cyl mode in order for it to work without the tack adaptor. It works great.

autometer
blk=ground
red=ignition power
white=illumination power
green=tach input

depending on what computer you have the tach output can be different colors.
you might also be able to tap into a coil pack wiring for tach output if needed, but most aftermarket computers have a provision for tach. You will need 2 cut the appropriate loop wires or flip the switches inside according to number of cylinders.