Author Topic: m42 swapped to m20 (Read 4292 times)

doubled · « **on:** January 18, 2007, 03:31:21 PM »

Hello, i`m having some, i`ll tell you my story.
Bought 318iS - nice engine, but too low nM for me, so i decidet to buy from my friend m20b27 - build with 2.5 head - and other stuff.. at all - nice - powerful engine...

installed engine...
installed m20b25 engine wiring - and connected to C101 clip - at originall 318is.
in picture

Now i`m having problem, that - there`s no spark and fuel pump isn`t giving the fuel to injectors...

maybe some body, has did the swap like me, and knows some tips - what should i do? today i`ll checked that 318is that round wiring - has 11 wires, but bottom 325 - 16 wires... maybe i need to install some additional wires?

:confused:

thanks guys

some pic with my old 318iS engine @ track

kowalski · « **Reply #1 on:** January 18, 2007, 04:17:37 PM »

did you swap to the 325 engine management and wirring harnesses? it doesn't sound like it... you need a 325 ecu and cables to be swapped in. nice e30 by the way.

romkasponka · « **Reply #2 on:** January 19, 2007, 03:26:45 AM »

Hi neighbours

I think you should replace ECU, if done it you should take multimeter and test all compenents wiring from ECU connector.

Why not M50?

doubled · « **Reply #3 on:** January 19, 2007, 07:54:24 AM »

swapped m20 engine with m20 engine wiring and m20 motronic ECU.
But "car" wiring - left old - 318iS wiring. fuse box and other things.

Why not m50.

Because i got this engine for cheap money, and that`s not stock engine, but guy build - engine is real powerful.

And i thouhg that swap will be easy,... now i`m thinking another thougts "about" easy swap...

romkasponka · « **Reply #4 on:** January 19, 2007, 03:27:30 PM »

you can try here http://www.bmwfan.puslapiai.lt/forumas/index.php?sid=c2bfce32c6691fbdb8c3a70c770e8c4d

there is few guys with big engine swap experience..

romkasponka · « **Reply #5 on:** January 20, 2007, 08:17:23 AM »

you should know that the M42 have direct ignition from ECU, and do not have relays at all for this function, it could be that M20 need few extra..

doubled · « **Reply #6 on:** January 20, 2007, 07:54:45 PM »

i have m20 engine wiring with these 3 relays...

today worked 7hours, but still no progress... i.m goin to kill myself

Gunni · « **Reply #7 on:** January 21, 2007, 08:00:16 AM »

are you getting 12v at the injectors?
and your getting 12v at the coil?

are you getting spark from the coil it self?
Whats the ECU # ?
Post up the wires in the C101 plug on both sides,
the numbers and colors,

Also what have you swapped with your friends 325i? And got no results

asubimmer · « **Reply #8 on:** January 21, 2007, 11:22:40 AM »

you could always go back to the m42 and boost...

hope you get it workin soon

Author Topic: m42 swapped to m20 (Read 4292 times)

doubled

doubled

doubled