kwik_ls1

iTrader: (60)

Hey I was wondering if anybody knows what fitting I need for these gauges to install them, or if anybody has a step by step on how to do these on a 99 Z28? Also if anybody knows what fittings for the water temp on this car also. I have all 3 of these gauges but am not sure on how to go about doing any of this. Any help would be appreciated. Thanks in advance for any help you can give me!

Pro Stock John

iTrader: (34)

I forget the size of the adaptor fitting you need to make the fuel pressure gauge work... maybe try a sponsor like Thunder Racing and see if they sell the fitting I got one locally but it was a pita.

The a/f gauge just required me tapping into the righ wire off the pcm...

Sears

For the FP gauge check this thread
https://ls1tech.com/threads/showflat...86&fpart=1

For the air/fuel gauge you will need to run the purple wire from the gauge to one of the following Pins on the PCM..

Pin# 68
PPL/WHT wire
HO2S SIGNAL HIGH BANK1 SENSOR 2
Passengerside front 02

Pin#69
PPL/WHT wire
HO2S SIGNAL HIGH BANK 1 SENSOR 1
Drivers side front 02

Instead of splicing the wire at the PCM I spliced it in the wire bundle that runs on top of the fuel rail on the drivers side. Just look for a purple/white wire in there.

All you other connections are just power, grounds, and dimmer.

Justin