Ok. My e34 has been off the road for 2 months. Now. Instead of turning it into my local shop I have been searching for the answer.

I now have the Peake Code Reader and got Code 1A meaning


"Control Unit Supply"


My EPROM? My DME? I have looked on this forum and found only one other person who was confused like me. I am checking the Conforti chip in my DME.

But I don't know what else to check.

Cylinder #1 does not fire. I think it has something to do with rain water, as I have had the problem in the past. This time, however, when I replaced the spark plug and boot (which cured previous ailments), I get the same slugging sputter with no power.

Squirted some water on 5 of 6 hot EM's to find that #1 is not joining in with the other kids. I haven't had any luck with the stomp test to double check the code that was thrown.

Here is a link to my previous attempt at overcoming this latest hoop that I need to jump through. http://www.bimmer.info/forum/showthread.php?t=35068