I just read on the other forum about having to cut.. what... 4 wires? is this true?? If so what wires and why? they said somethig about an idle control thing??



Bret

you can also cut the pins in the ECU if you don't wanna cut the harness. i'm not sure what the wires do, but the car will run like ******* if they are still connected

ha.. mabey that was why it wasnt running good when I hooked it up earlier.. I found another thread with a pic of what wires to cut...



but no one knows why we have to cut those??

i know that one is for AWS, but i'm not sure what the others do

they're for emissions crap

Again.. I keep getting reminded on why I hate it over here.... sometimes I think that the RX-7 would have been better off not being imported to the states... oh well.. guess I have to go cut some wires... :squint:

i never cut the wires on either of mine, and it ran fine



mike

cut the wires.. runs much better.. was getting really rough idle before.

Greetings,



I just got my new PFC, and there is an addition to the instructions for cutting wires. First, there's the usual 4 wires to cut. In addition, they now say the following:



"Cut the A/C out wire from the 22 pin connector (yellow/blue) and splice it into the A/C in wire in the same connector (purple). Do not remove the purple wire from the ECU."



The drawing that shows the harness now has handwritten notes showing the A/C in, and AC out wires. Has anyone else done this? Unless I hear otherwise, I guess I'll try it, perhaps later today.



Thanks,

Here's an update, FWIW. I installed the ECU, and the instructions are wrong in regard to the A/C out wire.



(SHORT VERSION)



The A/C out wire that is shown as yellow/blue, is actually yellow/black. The location is correct, but the color is wrong. There is a yellow/blue wire right next to it, but that is the wrong wire.



(LONG VERSION)



I cut the 4 wires that are called out normally. They all matched the drawing, and so no problem.



Step two is to cut the "A/C out wire... (yellow/blue)", and splice it into the A/C in wire (purple). The purple wire is where it's shown in the drawing. Unfortunately, the A/C out wire that's listed as yellow/blue, is actually yellow/black on the harness. To confuse matters even more, the wire next to it is yellow/blue.



OK, so the question becomes- is the drawing pointing to the correct wire, and labeling it the wrong color, or is the color correct, and it's pointing to the wrong location?



Out came the manual, and wiring diagrams. The location that's pointed out by the APEX diagram for "A/C out", is terminal 1L in the Mazda wiring diagram. This is listed by Mazda as "AC relay", and the color is "Y/B". This has to be the correct wire, since it goes to the AC relay. It's also understandable, though unforgivable, that APEX might read Y/B as yellow/blue. In the wiring diagram, Mazda uses B to mean Black, and L to mean Blue. The yellow/blue wire next to the AC location is terminal 1N, which goes to a pressure/mileage switch.



Bottom line is that the car runs, and the AC works. Now I get to start reading all those posts about idle hunting (which it does with a vengeance), and hesitation off idle.



Cheers,