Vortec350ss

iTrader: (20)

Hey Guys,

For those of you running nitrous on a 900 where are you grabbing the RPM and TPS signal from? I am trying to help someone out.

musclecity85

iTrader: (5)

you can grab tach from any injector..use any color wire except pink, pink/blk,pink/white. tps should be at the throttle body a green wire i believe

Three6GMC

iTrader: (11)

I think the tps signal is the blue wire, been awhile since I have tapped into mine... can verify with a volt meter pretty easy and actuating the tb. I grab a tac signal from the main coil connector on the passenger side that the coil harness connects to the main harness at. Top row second wire from the left I believe.

GM1697

iTrader: (1)

This would explain our issue... I tapped a pink one... Why can't pink be tapped?

GM1697

iTrader: (1)

TPS is the green or purple on the 900's, same as 800's. We successfully tapped both wires, and both provided signal, they'll read inverse of each other.

The problem we have is that REP mode occurs whenever we are tapped, take out the tap, REP goes away.

This didn't happen on my truck, with virtually same tap location.

GM1697

iTrader: (1)

As you can all see, Rob has the misfortune of cleaning up my mistakes

Three6GMC

iTrader: (11)

gotcha never used the green wire before, for some reason I thought it was blue but I'm sure we are talking about the same wire.

Which controller are you using? Sounds like its fried and back feeding a signal tripping out the computer.

GM1697

iTrader: (1)

NX Digital WOT/TPS window switch... it came straight outta my truck working and into this truck.

musclecity85

iTrader: (5)

i believe tapping the pink will cause the injector to stay open..therefore it could potentially load the cylinder with fuel and cause a major issue

musclecity85

iTrader: (5)

have you tried removing the tap and just soldering the wire? thats how mine was setup and i never had any problems