SWAP? 96-98 ECU & Engine Harness to 99-04 Ecu & Harness

98snakehorse · Nov 29, 2017

Background and Answers needed,

Just wanting to prepare a little bit for my dyno session next spring. Anything above 6k rpm my car has some breakup issue which I believe to be spark related. My 98gt has the RedMonster COP conversion harness which slightly weakens the spark output to the coils since my car originally had plug wires. Car is built and has a supercharger which I've just installed some blower cams will will allow my car to now make power at a slightly higher rpm.

The issue I have that in order to still use the COP harness I will have to install a boosta-spark box which I really dont want to. Another option is to go back to the plug wires which I dont want to either. Here is my questions, Is there anyone who has successfully swapped to the 99-04 ecu and engine harness? If this is something that would work I would gladly go that route.

Future plans are to go full standalone but my budget really isn't ready for that yet.

lwarrior1016 · Nov 29, 2017

There are a couple problems with doing that. Youll have to swap the dash harness and gauge cluster as well. The gauges run on a module and are more electronic than the older gauges. Then, Im not real sure what it would take for the fuse box and ccrm harness to work with the newer computer.

Definitely going to be a bunch of work lol.

98snakehorse · Nov 29, 2017

lwarrior1016 said:
There are a couple problems with doing that. Youll have to swap the dash harness and gauge cluster as well. The gauges run on a module and are more electronic than the older gauges. Then, Im not real sure what it would take for the fuse box and ccrm harness to work with the newer computer.

Definitely going to be a bunch of work lol.

Well $hit... lol standalone will be in my future then... maybe near

lwarrior1016 · Nov 29, 2017

Stand alone is fun! Too bad there isnt anything thats plug and play for us yet. If you did stand alone, you could run LS coil packs and never have spark issues again