LT4 air pump removal
Thread Starter
Instructor
Joined: Dec 2011
Posts: 191
Likes: 3
From: Sandy Springs Georgia
LT4 air pump removal
Just removed the all the AIR plumbing and and blocked off the back of the intake manifiold and plugged the bungs in the headers on my '96 LT4. Electric pump is still plugged in and does work. After a few drive cycles the SES light came on. Pulled codes and of course the Air injection system code came up. (don't recall the actual numeric code). With the pump plugged in and working the OBD II diagnostic must be reading the O2 sensors as way too rich at idle and not an electrical fault. I think that the code has to be programmed out of the PCM for the code not to set and light to stay off. Can any one tell me who or where I can get this done. I'm in Atlanta and don't have to deal with emissions testing (Senior Exemption). Thanks in Advance for any help.
Bill
Bill
Instructor
Joined: Apr 2013
Posts: 104
Likes: 2
From: Greenville SC
I think PCMFORLESS could probably handle the delete on that.
Just curious though. Why are you removing all of the EGR and Air pump? Is this something that you drive frequently, or is it just a Saturday Race Track toy?
If you've done all of that, I would make a WAG that you are getting a P0400 code for the lack of EGR.
I live in South Carolina where we have no state inspection at all, and I have no plans on deleting any of that on my 96 LT1.
Just curious though. Why are you removing all of the EGR and Air pump? Is this something that you drive frequently, or is it just a Saturday Race Track toy?
If you've done all of that, I would make a WAG that you are getting a P0400 code for the lack of EGR.
I live in South Carolina where we have no state inspection at all, and I have no plans on deleting any of that on my 96 LT1.
Thread Starter
Instructor
Joined: Dec 2011
Posts: 191
Likes: 3
From: Sandy Springs Georgia
I think PCMFORLESS could probably handle the delete on that.
Just curious though. Why are you removing all of the EGR and Air pump? Is this something that you drive frequently, or is it just a Saturday Race Track toy?
If you've done all of that, I would make a WAG that you are getting a P0400 code for the lack of EGR.
I live in South Carolina where we have no state inspection at all, and I have no plans on deleting any of that on my 96 LT1.
Just curious though. Why are you removing all of the EGR and Air pump? Is this something that you drive frequently, or is it just a Saturday Race Track toy?
If you've done all of that, I would make a WAG that you are getting a P0400 code for the lack of EGR.
I live in South Carolina where we have no state inspection at all, and I have no plans on deleting any of that on my 96 LT1.
Bill
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
When I swapped a 'built' LT4 into my 95 I put on long tube headers, no cats, and deleted the entire EGR system. Then PCM4less did the tune for me. Later I had it on the dyno and the pcm4less tune was about perfect.
Thread Starter
Instructor
Joined: Dec 2011
Posts: 191
Likes: 3
From: Sandy Springs Georgia
Thanks again
Bill
