Installed LTs, car idles like crap...
Thread Starter
Launching!
Joined: Mar 2008
Posts: 274
Likes: 7
From: Omaha, NE
Installed LTs, car idles like crap... I just put my LTs on and had my y pipe welded to the catback. Instead of buying O2 extensions I moved some pins around in the PCM to make the computer think the rear O2s are the front O2s so that I could just plug the rears into the slots on the headers. I saw a thread about it a while back, ill try to find it again. Anyways my question is, i dont have my codes deleted yet, so is that one of the reasons why it is not idling smoothly? Or are the rear O2s physically different than the front ones? Any experience/advice is welcome.
Re-arrenging pins and playing with the pcm has never came out good for me. I used the O2 simulators for the rear with mine and the longer vette O2 sensors for the fronts. No problems and no codes.
Might be a leak somewhere? When I did the pcm pin swap, I still used the rear o2s.
It idled fine. Didn't have codes deleted and I had also done EGR and AIR delete. I drove it around for sometime, and it drove fine.
It idled fine. Didn't have codes deleted and I had also done EGR and AIR delete. I drove it around for sometime, and it drove fine.
Thread Starter
Launching!
Joined: Mar 2008
Posts: 274
Likes: 7
From: Omaha, NE
I also deleted AIR and EGR and made block off plates for the headers. I will try to plug in the front O2s in the rear spot and into the headers and see if it makes a difference. Also there is a leak where the drivers side header meets the y pipe. Im going to take it back to the shop on monday and have them weld it shut. But will a leak really make that much of a difference on the quality of idle?
Thread Starter
Launching!
Joined: Mar 2008
Posts: 274
Likes: 7
From: Omaha, NE
How much did the vette O2s run you? If i cant figure this out im gonna swap the pins back and use the vette O2s.
I also deleted AIR and EGR and made block off plates for the headers. I will try to plug in the front O2s in the rear spot and into the headers and see if it makes a difference. Also there is a leak where the drivers side header meets the y pipe. Im going to take it back to the shop on monday and have them weld it shut. But will a leak really make that much of a difference on the quality of idle?
What I did, was get copper ultra silicone and put a bead around the band clamps on the the header collectors. Worked great
Thread Starter
Launching!
Joined: Mar 2008
Posts: 274
Likes: 7
From: Omaha, NE
Here are the links to the pin swap
https://ls1tech.com/forums/pcm-diagn...front-o2s.html
http://www.ls2.com/boggs/torques/98pinpcm.htm
Has anybody had success with this?
https://ls1tech.com/forums/pcm-diagn...front-o2s.html
http://www.ls2.com/boggs/torques/98pinpcm.htm
Has anybody had success with this?
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Launching!
Joined: Sep 2007
Posts: 230
Likes: 0
From: Surrey, BC
Here are the links to the pin swap
https://ls1tech.com/forums/pcm-diagn...front-o2s.html
http://www.ls2.com/boggs/torques/98pinpcm.htm
Has anybody had success with this?
https://ls1tech.com/forums/pcm-diagn...front-o2s.html
http://www.ls2.com/boggs/torques/98pinpcm.htm
Has anybody had success with this?
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Launching!
Joined: Mar 2008
Posts: 274
Likes: 7
From: Omaha, NE
All i know is the 98s are different from the 99-02s. But apparently the 99s are different from the 00-02s also. I have not had success so far with my pin swap, but i am going to pull the PCM off again and check to make sure they are all in the right spot. If they are all correct, i might just swap them back and buy some rear vette O2s and see if the car runs better with those.