LS6 Intake Manifold Project Update
Here are Two
https://ls1tech.com/forums/ls4-front...questions.html
https://ls1tech.com/forums/ls4-front...take-swap.html
swap I have yet to put the ls6 manifold on the car. I have had a lot of stuff to do around the house, the weather has been pretty poor and the dog ate my homework. Ok plenty of excuses. I have painted the manifold and fuel rails and TB. I have also gotten a set of the truck ignition coils that I plan on installing at the same time, I painted them too.
I used a truck electronic TB, it bolts right up to LS6 manifold without adaptors, it is same inside diameter as stock LS4, just uses a 4" intake air tube, and I had to make an adaptor cable to plug it to LS4 TB cable as contact pins on the truck TB are in different locations in plug. See these photos before painting. I tapped and screwed in vacuum ports on truck TB to accomodate PCV and brakes which are lost from the manifold swap.
I used a truck electronic TB, it bolts right up to LS6 manifold without adaptors, it is same inside diameter as stock LS4, just uses a 4" intake air tube, and I had to make an adaptor cable to plug it to LS4 TB cable as contact pins on the truck TB are in different locations in plug. See these photos before painting. I tapped and screwed in vacuum ports on truck TB to accomodate PCV and brakes which are lost from the manifold swap.
I have not connected or installed anything yet. I have no reason to believe it won't work, wire diagram info is from GM and pretty simple adaptor to make, only switching wire positions. It would be tough to test without the actual manifold swap as you would need to have car running to make throttle work and throttle won't bolt up to LS4 manifold
Well you might want to check it b/c I used your wire diagram from here https://ls1tech.com/forums/ls4-front...questions.html and it does not work. Just wanna save you some time so you don't get knee deep in this swap and **** don't work lmk what you find out plz.
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Make sure the pins are in the right order. The diagrams are both the female version.
This is the truck one.
8 pin truck
A TAC Motor Control - 1
B Common Ground
C TAC Motor Control - 2
D Common Ground
E 5 Volt Reference
F TP Sensor 2 Signal
G TP Sensor 1 Signal
H 5 Volt Reference
There's the exact same picture in my service manual with these as the descriptions.
8 pin LS4
A TP Sensor 1 Signal
B 5 Volt Reference
C Common Ground
D TP Sensor 2 Signal
E TAC Motor Control - 1
F TAC Motor Control - 2
G 5 Volt Reference
H Common Ground
I can dig up wire colors if you really want.
LS4 Throttle Body Wire Colors and Circuits
A D-GN circuit 485
B L-BU circuit 6295
C TN circuit 2752
D PU circuit 486
E YE circuit 581
F BN circuit 582
G GY circuit 2701
H L-BU/BK circuit 6297
My Manual is 2007 W-Body Monte Carlo/Impala.
This is the truck one.
8 pin truck
A TAC Motor Control - 1
B Common Ground
C TAC Motor Control - 2
D Common Ground
E 5 Volt Reference
F TP Sensor 2 Signal
G TP Sensor 1 Signal
H 5 Volt Reference
There's the exact same picture in my service manual with these as the descriptions.
8 pin LS4
A TP Sensor 1 Signal
B 5 Volt Reference
C Common Ground
D TP Sensor 2 Signal
E TAC Motor Control - 1
F TAC Motor Control - 2
G 5 Volt Reference
H Common Ground
I can dig up wire colors if you really want.
LS4 Throttle Body Wire Colors and Circuits
A D-GN circuit 485
B L-BU circuit 6295
C TN circuit 2752
D PU circuit 486
E YE circuit 581
F BN circuit 582
G GY circuit 2701
H L-BU/BK circuit 6297
My Manual is 2007 W-Body Monte Carlo/Impala.
Last edited by neilownz; May 14, 2010 at 09:33 PM.
The problem most people have when making a wire adaptor cable is keeping oriented as to front and rear of the plugs and wire positions. Looking at the digran above "A" pin is upper right when looking at plug from the front, but it would be upper left position when looking at plug from rear. I am pretty sure I got it right. You also have to make sure you are careful and have right tools to make an adaptor cable and have electrical continuity.
LS6 Manifold painted Here is what the LS6 manifold and TB looks like painted with "annodize" paint.
I didn't take pics of the coils, but they are the red annodize color now.
I didn't take pics of the coils, but they are the red annodize color now.
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Verdad Gallardo Just a thought, but any suggestions on how to test out the adaptor cable? Can I start the engine, disconnect the cable to the stock LS4 TB and connect it to adaptor cable and LS6 truck TB, depress gas peddle and see if truck TB opens? Would this hurt anything?
The problem most people have when making a wire adaptor cable is keeping oriented as to front and rear of the plugs and wire positions. Looking at the digran above "A" pin is upper right when looking at plug from the front, but it would be upper left position when looking at plug from rear. I am pretty sure I got it right. You also have to make sure you are careful and have right tools to make an adaptor cable and have electrical continuity.
TRUCK tb / LS4 WIRE HARNESS
A = E
B = C OR H
C = F
D = C OR H
E = G
F = D
G = A
H = B
This is why I said screw it, and am having a custom tb adapter casted this weekend. We already have the dimensions, and are good to go. We are also going to making extras. Hint... hint....
I sold my LS6 btw, going LS1 to cut costs and install nitrious. This car is done and its time to build something.
I sold my LS6 btw, going LS1 to cut costs and install nitrious. This car is done and its time to build something.
OK, NOW>>>>
When looking at your cable adaptor, looking at the back of the connectors...
The female connector to the Truck TB=A is upper left (top of connector has locking lug)
The male connector to existing LS4 cable= A is upper right.
It's confusing because one is male, one is female
When looking at your cable adaptor, looking at the back of the connectors...
The female connector to the Truck TB=A is upper left (top of connector has locking lug)
The male connector to existing LS4 cable= A is upper right.
It's confusing because one is male, one is female
You don't have to start your car just turn the key forward to power everything up and step on peddle, the TB will open without having the vehicle running. Great job btw...
Well, thanks for the good words on the paint job. Not hard to do, just clean everything really well, use adhesion promoter (clear primer) and spray it. It's a 2 part system on non-chrome or non-silver/aluminum items. First you spray the silver metalic base coat, then the transparent color coat. Avalible in red, blue and purple around here. It works great right over chrome, no basecoat.
I will try hooking up the truck TB with the adapter cable soon and let you guys know if it works for me.
I will try hooking up the truck TB with the adapter cable soon and let you guys know if it works for me.
OK, NOW>>>>
When looking at your cable adaptor, looking at the back of the connectors...
The female connector to the Truck TB=A is upper left (top of connector has locking lug)
The male connector to existing LS4 cable= A is upper right.
It's confusing because one is male, one is female
When looking at your cable adaptor, looking at the back of the connectors...
The female connector to the Truck TB=A is upper left (top of connector has locking lug)
The male connector to existing LS4 cable= A is upper right.
It's confusing because one is male, one is female
Wow dude forget I said anything too you. I was just tryin to help you out. I don't need you to talk to me like I'm some dumb *** that doesn't know how to read. LIKE I SAID BEFOR I DID IT JUST AS YOU DID!!!!!!!!!!!!!!AND IT DOESN'T WORKNow back to my thoughts on this I think the 5volt ref. wires need swiched because it does matter where they go. I'll do this and let ya'll know later in the week.
Now somebody figure out if this is gonna work or not! LMAO!