MatthewPFinch

Hello everyone I have a 98 z28 that I will be modding fairly heavily. I know that it is possible to tune the 98 PCM, however with the long term goals of the car I feel the need to upgrade the PCM. I have a couple of questions:

Is it beneficial to buy a 99-01 harness vs. simply re-pinning the entire 98 harness?
Does anyone offer a conversion harness plug and play?

I have search and all I find is old threads and info. Didn't know if there is anything new in this swap that would make it easier?

oange ss

iTrader: (50)

easier to re-pin your harness, but apparently there are issues with the cluster to overcome

Graves

If you are looking to swap to a 99-01 0411 PCM there are quite a few companies out there that make harness for those. Re-pinning the factory harness can be a pain unless you have the patience to go through the diagrams.

Ive used PSI Conversion for an LS swap and it installed quickly and has a very clean look.

Fullen

iTrader: (9)

Here's my repin...it was a nightmare. Looking back...it wasn't that bad, just frustrating.

LSX Power Tuning

iTrader: (4)

That doesnt look fun, I have re-pinned a bunch of 98 harnesses but always done them out of the car. That looks like a back killer.

gearhead36

Dude my back hurts just thinking about bending over that engine bay for that job

Fullen

iTrader: (9)

Looking back...I should have just pulled it out of the car. I just didn't feel like pulling it. If the cowl was still there I would have definitely pulled it.

Klortho

iTrader: (2)

I repinned my 98 harness was out of the car. There is a site that has step by step on what pin to move from one connector to the 99+ connector. I lucked up and have a buddy who had a lot of old truck harness that I got two connectors off of and used them. The site I used also tells which wires to eliminate as well. The only problem I have is the fuel gauge which trying to decide on having the PCM tuned for the 98 sender or just put the tank from my 00 parts car I have in it.

MontecarloDrag

iTrader: (3)

I have repined and modified a lot of harnesses. I always take it out of the car, bring my favorite chair, a small table and a six pack. It's much easier for my back to take the time to unplug it and take it out of the car so I can comfortably work on it.

Klortho

iTrader: (2)

Found the site....here is a link to the PDF. It worked perfect for me

http://mrk-motorsports.com/pdf/1998%...1999%20PCM.pdf

Jmertlsx

I need to repin my 98 harness so I can use a 2000 pcm. Van you message me instructions on doing so please?! Would be a great help! Thanks