2 Questions? First about COP and second about MX-3 ECUs

Xtremethings · Post by **Xtremethings** » September 25th, 2007, 11:49 pm

First of all I am new somewhat according to my info to the left. But actually I deleted my old e-mail long ago and so I am now unable to obtain my login for that name so AKA (KLZE Porsche) Also on P/T!

But to my first question:

Has anybody been successful with a COP conversion? I am working on one myself and I need some tips for a true 6 channel system.

Secondly -I have heard that some people have been successful with using standard 2.5KL ECUs in an MX-3 swap. However I was working with a freind of mine to install a chipped ECU and his car wouldn't run with the chipped KL 2.5L ECU. So I tried chipping his K801 ECU and the car still wouldn't run. I pulled the KLZE EEPROM and installed the original EEPROM and the car runs. So does this mean that the 92-95 MX3 wiring/distributor/ECU are not compatible with KL 2.5L ECUs or EEPROMs or what? I have read that some cars get their CKP (crankshaft postion) signal from the crankshaft sensor and some get it from a sensor in the distributor. If this be true and since the distributor runs at 1/2 the speed of the crank then does this mean that a disty CKP signal will never work with crank CKP wired car? I am looking to make an adapter so that people can use the KL ECUS but I am stuck like a rock in a hard place. I have been breaking my brain studying 4 different wiring manuals and trying to compile all the information. Perhaps someone is much more schooled on this matter and can give me some hints.

PATDIESEL · Post by **PATDIESEL** » September 26th, 2007, 12:04 pm

I don't think there are any members here that chip thier own ECUs. Thus I don't think that any of us know enough about the internal workings of the ECU to answer your question exactly. However, I do know a bit that I will share.
The ECU I use to run my ZE is a chipped K8 ECU. I was chipped through Cork Sport, who outsources the work to another company. My ZE is OBDI and so was my K8. I would think they need to be the same in order to work properly. You posted 92-95, but it depends on where the car was originally sold as to whether it will be OBDI or II in 95. I am not 100%, but think that most of the world got OBDII MX-3s in 95 and beyond. Since they quit selling them in the US in 94 we only go to OBDI.
The ECU uses both the crank and cam sensor of course. If I am correct, and I think I am, it uses the crank for cyl. #1 TDC and the cam for spark and fuel timing. I do not know much about tuning engine management, so take what I say at an elementary level.
If you need more info I would contact Grants on Team Eunos's website or Yoda here on MX-3.com

Xtremethings · Post by **Xtremethings** » September 26th, 2007, 5:07 pm

Thank you mucho for your info. I was not aware that most had gone to OBDII in 95. With the PGT's, MX-6's and 626 cars I don't believe they went to OBDII until 96. I guess the MX-3 cars were a year ahead of their time. They came out with the KL V6 a year earlier in 92 and went to OBDII a year earlier. hmmmm.....

Well I am still open to any more new info since I know very little about the MX-3. And thanks for the leads. I will have to hit them up.

Tunes67 · Post by **Tunes67** » September 26th, 2007, 5:46 pm

MX-3's went OBDII in 96.. but there were some early bird cars that had OBDII as early as 94. All 96's are OBDII.

Tunes67

Xtremethings · Post by **Xtremethings** » September 26th, 2007, 10:53 pm

Tunes67 wrote:MX-3's went OBDII in 96.. but there were some early bird cars that had OBDII as early as 94. All 96's are OBDII.

Tunes67

Well that sort of confirms what I had suspected. Someone had told me that all MX3 cars were wired the sam way from 92 to 96 but I was just finding too many inconsistencies. Was there any wiring variations between 92 and 94 1.8L V6 cars?