The little info I know about this... 03-07 DBW PCM does not have a controller for a IAC, so you have to use a 99-02 PCM and repin everything to make it work. But like Dan said, Allen has done it a few time's so you should talk to him.

 

Some PCM all the way up to 2007 have IAC drivers

 

I wanted to keep my DBW, but I have had problems since the 87/90mm conversion. I am actually leaning towards a bad X-link now. I have horrible luck, and if there was 1 bad one out of 10,000 I guarantee I would be the one to get it. My codes have gotten worse with time, and all my wires looked and tested to be OK. I had my truck at my fathers shop about 20 miles away from my house, and it started going into REP as soon as I turned the key. He let me borrow a truck, and I am very thankful for that. I was just mad that I had to use one of his trucks to drive home when I should have just worked on it in my garage. Well today when I was at work I remembered that I still had my 78mm DBW T-body kicking around at my house. I decided to plug it in to the 8 pin plug, and see if I get codes. Well I didn't get any codes. I swapped both my 87, and 90mm T-bodies on, and got the same codes again. I was bound and determined to drive my truck home because I hate the feeling of having to borrow something from my parents at my age. Well what does someone do when they have a working 78mm 3 bolt flange T-body, and a 4 bolt flange to mount it on? You guessed it, look for duck tape!! Well it idled a little high, but I never threw a code.

 

nice.
at least you could drive it again. So you gonna try a new x-link?

 

Yeah, I think I will try a new one. I have been emailing them about it.

 

That is a new use for duct tape.

 

seems we are having similar if not the the same problem.

what specific codes are you experiencing?


Any input from Nelson?

 

PM sent EVILGMC.

 

Couple of questions.

Did you update the tune for the bigger TB?

When did the problem start?

Have you tried replacing the PCM?

 

I have had this TB for years, and gives same symptoms when I try a different one.

Problem started during burnout of my 10th pass at a track day. Was intermittent at first...then 100% FUCKED

I am looking for a spare PCM and also a local solution to get my tune into it (dont have tuning software or a bench harness)


Not trying to jack this thread....but seems like we are fighting similar battles.