M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: bflan2001 on November 25, 2015, 02:59:07 PM

Title: COP conversion wiring help
Post by: bflan2001 on November 25, 2015, 02:59:07 PM

I'm trying to start a freshly swapped m42 and I think my coil wiring might be wrong. Is there an easy way to tell which plug goes to which cylinder? We tried shortest to longest and it doesn't want to start.

Title: Re: COP conversion wiring help
Post by: sh123 on November 25, 2015, 03:29:43 PM

This is for m44. But im pretty sure it will be the same. Scroll down a bit

http://bmwz3diys.weebly.com/coil-on-plug-conversion-bmw-z3-19-m44.html (http://bmwz3diys.weebly.com/coil-on-plug-conversion-bmw-z3-19-m44.html)

Title: Re: COP conversion wiring help
Post by: bflan2001 on November 26, 2015, 10:25:47 AM

Unfortunately the M42 is different. The geniuses at BMW decided to use identical wire colors for all four coil plugs on the M42.

Title: Re: COP conversion wiring help
Post by: sh123 on November 26, 2015, 12:21:11 PM

Ah. Right. Fair enough... good luck.

Title: Re: COP conversion wiring help
Post by: bflan2001 on November 29, 2015, 03:16:02 AM

For anyone who happens to stumble on this thread and has the same issue as me, here is the pinout so that you can do a continuity test on the wires to figure out which cylinder is which. Cylinders 1-4 are on pins 25, 52, 24, 51 respectively.

 (http://i764.photobucket.com/albums/xx288/tomrd/88pinconnector_zpsqcdkv1rc.jpg)