Well after tons of headaches and a ton of research I couldn't get the 3.0 relay to work correctly with my swap. Trust me I tried all possibilities. This is a simple writeup on wiring your new 3.4 relay into your old 3.0 wiring. Many thanks to all that helped. dntsdad, hamish, and the rest of the gang.



Side by Side view of the 3.0 COR Vs 3.4 COR



Now since I didn't have the connector to plug right into the 3.4 COR I used the stock 3.0 connector and just unpinned the female blade connectors from the plastic plug. Note that both grounds are not used in the conversion, and that the White / Red wire needs to be split into two wires. I will suggest taking one male blade connector and split the connection with two wires and female blade connections off of that.



Here is the relay all installed. The way I have it connected should last forever, however i will heat shrink the out side of the metal blade connectors just for safety.



http://www.autozone.com/autozone/cat...archText=19997

So now the fuel pump is now activated off the ECU like it should. Woot! Thanks once again guys!

 

great post. i told you i didnt do anything to my cor, but looking at your wiring diagram, i think all i did the green/yellow. but i cant say for sure now, because i cant see all the diagram. lol.

 

good post Demon

You car stereo guys could also use a standard Bosch relay as well but for that price for the replacement COR from Autozone, that is a viable option as well.

 

Thanks for the post I will print it up to finish up my swap.

 

I did not have to do that at all. I took the green yellow wire from the 3.4 ecu labeled as fc on the ecu and connected it to the [c1] body plug green yellow wire that runs to the cor relay. Works just fine.

 

Would it be possible to repost the pictures from the first post ? I cannot view them for some reason.
Thanks

 

Not sure that demonkid has been around lately but he may have deleted the account that was hosting those photos. May be gone forever.

You can check out my 3.4 101 thread at the top in the stickies. Hopefully that can help you with your issues regarding the COR. If not, post up a question.

 

Jason, it appears that many of the threads have the photos deleted. However, it is my hope that someone retained the post and could repost it. Your postings have been extremely helpful.
Thanks,
Tim

 

I highly doubt anyone saved offline copies of those photos. dntsdad 101 post should explain how to do everything. Once you understand how a relay works, it's quite simple to hook it up properly.

 

My G-Y to G-Y worked perfectly also, when I hooked up the correct G-Y from the cowl harness! In my 90 3vz cowl harness there is a G-Y for the COR and also one for the 4wd indicator switch. I had the G-Y from my 96 5vz plug(COR 1) to my 3vz 4wd G-Y and it would fire then slowly die out and my 4wd light on the dash was constantly illuminated. I swapped the two G-Y's from the 3vz cowl harness and everything worked fine. Hope this helps someone, I have read every post on every forum and couldn't figure it out and this is the first link that comes up when searching 3.4 swap COR wiring so I figured I would throw it out there.

 

Any one out there use demOnk1d's how to for their swap ?