I've looked at forum after forum, and I don't know what I'm doing wrong. I have a 97 camaro z28. I'm trying to install a 5" tach. I have power, light comes on with headlights, and a good ground. But no matter where I hook the tach wire to it refuses to work. I tried the white ICM wire and the white wire in the PCM at A13. I've been stumped for days now. Any help will be greatly appreciated.

 

Maybe providing info like the brand and model tach you have will help get you an answer.

 

Sorry, didn't think of that. It's a 5" Autometer tach with shift light. Got it from a friend that had a v6 so the brown wire was cut but I soldered it together. Anyone use the crankshaft position sensor wire?

 

The AutoMeter 5" tachs are calibrated for 4 pulses per crank rev. The reluctor in the 96/97 has 4 pulses per crank rev.

Note that different models of the 5" tach can be recalibrated via different methods. No substitute for the manufacturer's install instructions......

http://www.autometer.com/media/2650-1244.pdf

Typically, you put the green wire on the coil negative. This is not recommended if you are using a multiple discharge ignition like MSD, Crane, etc. See instructions.

 

Thanks Fred, I am running stock ignition for the time being. The coil is located in front of the driver side cylinder head correct? This is my first LT1.

 

Use this website for info on the LT1:

4th Gen LT1 F-Body Tech Aids

http://shbox.com/1/coil_loc.jpg

http://shbox.com/1/1996_ec_03_ign_system.jpg