Those of you upgrading to LS2 throttle body
Thread Starter
Teching In
Joined: Jun 2017
Posts: 48
Likes: 8
From: vegas
Those of you upgrading to LS2 throttle body Might be old news, but for those of you that are in the same boat i was in, here we go.
SO, after NUMEROUS attempts at this, i have finally figured it out.
Little background:
gen 3.5 engine [gen4 internals, gen 3 block]
317 heads
gto ls2 intake
gen 3 harness [reworked]
gen 3 truck ecu [0411]
gen 3 truck pedal [couldn't find part number]
gen 3 truck tac [plastic bottom - BD 25173339 c]
silver blade throttle body from GTO [12570790]
i have attempted to make this thing work a million times and it would just kick on, open 100% then close with no pedal response...... wtf
so today i did a little more research and tried to swap the TPS wires around. Low and behold, it worked like a champ. Opens 100% [kinda early], so it might need a little adjustment, but this is with an UNMODIFIED PCM....... vats hasn't even been removed from it yet.
I have HP tuners so ill mess with it to try to get a more linear opening.
you don't need an adapter harness, just cut and resplice if you are good at wiring.
here is the connector on the truck harness that i had and the GTO connector........ wiring schematics below.
results
SO, after NUMEROUS attempts at this, i have finally figured it out.
Little background:
gen 3.5 engine [gen4 internals, gen 3 block]
317 heads
gto ls2 intake
gen 3 harness [reworked]
gen 3 truck ecu [0411]
gen 3 truck pedal [couldn't find part number]
gen 3 truck tac [plastic bottom - BD 25173339 c]
silver blade throttle body from GTO [12570790]
i have attempted to make this thing work a million times and it would just kick on, open 100% then close with no pedal response...... wtf
so today i did a little more research and tried to swap the TPS wires around. Low and behold, it worked like a champ. Opens 100% [kinda early], so it might need a little adjustment, but this is with an UNMODIFIED PCM....... vats hasn't even been removed from it yet.
I have HP tuners so ill mess with it to try to get a more linear opening.
you don't need an adapter harness, just cut and resplice if you are good at wiring.
here is the connector on the truck harness that i had and the GTO connector........ wiring schematics below.
results
