For you guys bolting up Headers..
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
For you guys bolting up Headers.. This is something that I've been doing and it's worked flawlessely..figured I'd throw it out there to help out..
Instead of using the POS Extensions that you get for/with the LT Headers I've been re-wiring the rear O2 Sensor Connectors to be the primary ones, then clipping the front two Connectors off.
For 1998 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
1 <--> 5
2 <--> 6
41 <--> 46
42 <--> 47
For 1999-2002 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
25 <--> 26
28 <--> 29
65 <--> 66
68 <--> 69
Since most of us do LS1 F-bodies this will help out alot..it saves $50 on extensions that you burn up a month later..lol
If I can get ahold of the PCM diagrams for C5 & C6 Corvettes, and LT1 Cars I can put that info out here too.
Instead of using the POS Extensions that you get for/with the LT Headers I've been re-wiring the rear O2 Sensor Connectors to be the primary ones, then clipping the front two Connectors off.
For 1998 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
1 <--> 5
2 <--> 6
41 <--> 46
42 <--> 47
For 1999-2002 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
25 <--> 26
28 <--> 29
65 <--> 66
68 <--> 69
Since most of us do LS1 F-bodies this will help out alot..it saves $50 on extensions that you burn up a month later..lol
If I can get ahold of the PCM diagrams for C5 & C6 Corvettes, and LT1 Cars I can put that info out here too.
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Thanks for the input.
Now for those of us that like to get our hands dirty & think outside the box it takes 10 min to do and saves $50..so take it fwiw when you burn your extensions..
Now for those of us that like to get our hands dirty & think outside the box it takes 10 min to do and saves $50..so take it fwiw when you burn your extensions..
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
I dont know how much more detailed you can get..lol..unbolt the Blue PCM Connector, take the clip off and pop the wires out..
I'll do it here in a little bit..I'll take pics..
I'll do it here in a little bit..I'll take pics..
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Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
.. if there is one then I guess there is one..if it takes a min to find it then I guess what I put out will suffice for now..lol. Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Ok here's some pics..
Find the PCM..that thing there in the corner.
Using a 7mm sized tool loosen the bolt in the middle of the top Connector..this is the blue Connector..
Remove the plastic guard..some are brittle..that's why this one is cracked..
If you look closely you can see the PIN Numbers above & below the wires..
Flip the Connector over and with a pic carefully remove the retaining clip..depress the little tab in the slot on each side of them and slightly pull..
To remove the Pin just push it forward a hair, then with your finger nail pull up on the tab..then pull the pin through the other side..
Then when you have the other one out just push it through and it locks in place. When you are finished put everything back together and you are done..
Here's the ones you switch again..
For 1998 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
1 <--> 5
2 <--> 6
41 <--> 46
42 <--> 47
For 1999-2002 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
25 <--> 26
28 <--> 29
65 <--> 66
68 <--> 69
If you notice in the pic I already have it done..that car is one of the guys that I live with..we just built it.
Find the PCM..that thing there in the corner.
Using a 7mm sized tool loosen the bolt in the middle of the top Connector..this is the blue Connector..
Remove the plastic guard..some are brittle..that's why this one is cracked..
If you look closely you can see the PIN Numbers above & below the wires..
Flip the Connector over and with a pic carefully remove the retaining clip..depress the little tab in the slot on each side of them and slightly pull..
To remove the Pin just push it forward a hair, then with your finger nail pull up on the tab..then pull the pin through the other side..
Then when you have the other one out just push it through and it locks in place. When you are finished put everything back together and you are done..
Here's the ones you switch again..
For 1998 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
1 <--> 5
2 <--> 6
41 <--> 46
42 <--> 47
For 1999-2002 F-body..
BLUE PCM CONNECTOR
SWITCH THESE WIRES
PINS:
25 <--> 26
28 <--> 29
65 <--> 66
68 <--> 69
If you notice in the pic I already have it done..that car is one of the guys that I live with..we just built it.
Thread Starter
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
It might take more time to do this than to just run an extension..but the way I see it is the wires are there so might aswell use them & save money.
Here is the first thread where I learned of this...
https://ls1tech.com/forums/generatio...g-install.html
Post #14.
This is really good info to have and there are mutliple threads that include it. Just do a search for "PCM Pins".
https://ls1tech.com/forums/generatio...g-install.html
Post #14.
This is really good info to have and there are mutliple threads that include it. Just do a search for "PCM Pins".