Author Topic: M42 wiring (Read 5145 times)

Vladi · « **on:** September 02, 2007, 04:48:26 PM »

I've got a friend who recently swaped an E30 M42 and managed to fry his ECU. Trouble is we can't find an e30 m42 ECU anywhere, but we found 3 busted e36 m42's. (mechanical reasons)
Could we take the wiring harness and the ECU from an e36 m42 and install it an the e30 m42?:rolleyes:

Thanks!

ak96ss · « **Reply #1 on:** September 02, 2007, 05:00:17 PM »

May be able to, but the E36 ECU is going to be looking for a knock sensor, so you'll need to get used to the check engine light. Too bad you aren't in the US, I have two E30 M42 ECUs sitting here.

Lund8200 · « **Reply #2 on:** September 10, 2007, 03:46:27 PM »

I have been running a E36 ECU on my E30 318iS, it made no faults for the short time it was mounted.
BTW, there is a few ECU�s for sale on http://www.ebay.de

Artem · « **Reply #3 on:** March 13, 2008, 10:48:00 PM »

Can I flash the chip with the E36 tuned software and run it that way?

Or use the chip from the E36 DME?

-Artem

vatos_p · « **Reply #4 on:** March 14, 2008, 12:59:27 AM »

you can just change the wiring and the ecu with a m42 e36 ecu , and add knock sensor , change the AFM with a MAF ( the e36 uses maf ) and the car will work fine...

Artem · « **Reply #5 on:** March 14, 2008, 02:33:46 AM »

Quote from: vatos_p;44757

you can just change the wiring and the ecu with a m42 e36 ecu , and add knock sensor , change the AFM with a MAF ( the e36 uses maf ) and the car will work fine...

Yea, I was kinda hoping to avoid that... I wanted to use stock wiring from an E30, but a 95 motor. And I know that the cams are going to be different, so I figured the fuel maps would probably have to be different as well, right? I mean I know it will probably run, but not well... (Or am I wrong?) I would do the wiring thing, but I am pretty sure I am only getting the bare engine, so I wont have the access to that, unless I buy it all separately.

-Artem

Artem · « **Reply #6 on:** March 22, 2008, 03:06:07 AM »

Hello, I would like to bump this as I really need help.

I got the motor, its in very good shape, I want to put all my E30 accs on it, and run it, however I dont want it to run like crap when i put it in the car. I am pretty sure the cams are of a different design for the E36 318is, especially the later one - as I have the 95 motor, that is why I would like to know if anyone can tell me, if I put the stock E30 wiring harness and the E30 DME and sensors, what will happen to the way the car runs, I would like to have the similar fuel economy and the power of an E36, on a stock E30 DME, and for that I would probably just need a fuel map, right?

I am new to this mapping thing and I would really like some help please!!

Thank you!!