not familiar with the m40, other than it apparently is the single cam version like an m10, but with a better flowing cylinder head.


pics would help sort this out, but iirc, the m44 is distributorless, while the m40 has a distributor at the front of the cam. two completely different animals.

i'm not sure if there is a way to get the ignition system to work without a wiring diagram and dme upgrade. :dunno:

this would be because there is more than 1 coil involved, and no way to differentiate between the coil packs with the m40 wiring.




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Ive done the complete loom change so its a little annoying that im having alittle trouble

ok, if the proper loom (wiring harness for us yanks) is being used, then i do not understand the question.

are you talking about the firing order for the ignition wires?? :dunno:

if so, then yes, the correct firing order is 1342. however, the coil towers for 1 & 4, 2 & 3, are sistered, so they will spark simultaneously, resulting in a 'wasted spark' on the non firing cylinder (which is on an exhaust stroke), if you have that sort of ignition system.

my google searches show me lots of stuff, so i am simply going to post it here for clarity.

i have 3 ignition systems, the one is a 'squarish' coil pack, the other a longer 'row' of coils in a pack. and finaly a coil over ignition.

i think this should help.


found an extra diagram of the m42 also, so i thought that would add it as well.




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