The interwebs is saying that I might not be able to use a red/blue computer because the function of the 4l80e trans wont work correctly. i have a lt1.com tbi454/4l80e harness for my 92 tbi454/4l803...

I have replaced the fuel pump with the mentioned vortec one. i haven't check fuel pressure but i assume with the replacement and the new fuel filter I installed. Lack of fuel isn't the problem unless...

Good morning, man am I at a loss. I am starting to think my computer is bad but am having trouble finding the right info to try to get a replacement. I'm looking for some help. I tried to find the...

I'm struggling on two items I was hoping you guys could help with.

I swapped in a 92 tbi 454, 4l80e, harness and computer all out of the same rig into my suburban. It was a 91 tbi 350, 4l80e...

So I think I'll be taking it to a shop this week unless I can figure out the malfunction. Swapped the 92 ecm with the 91 ecm and right on start up the rpm's dropped down to around 700. Seemed to run...

I think the iac was stuck. After removing it and shoving my finger in the iac hole in the tbi unit. It came down off high idel but now is running super rich. I don't think the vacuum advance...

Well, this has been both fun and educational. Joking, not so fun unless fun stands for frustrating. ��

I went the route of the 454 with factory wiring harness and computer from the donor motor. I...

I think I have most what I need at this point. The 91 sub is a v2500 suburban square body and the 92 was a gmc k2500 extra cab long bed. I found the suburban wiring diagrams on the...

much appreciated.

I have install a 92 TBI 454 big block & 4l80e into my 91 suburban. The drivers side firewall plugs are pin'd different and I'm trying to find the 92 diagram so I can make the two work together...

So locally at a salvage yard, I have found a 94 2wd 454 4l80 in their inventory that got dropped yesterday. I'm going to run and try to salvage the computer and harness before it get pillaged. The...

Hello everyone,

New to site, new post, hoping for some help.

I been beating up the google search bar and kept liking what I have found on this site. You guys have lots of good info. I believe...