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I’ve owned this one for around 25yrs but took it off the road when the rolling road smog testing came into use in CA. It ran great but NOX was high. So it’s been resting in the garage for many years. Recently I removed the add on O2 sensor circuit and installed a US version DME with the O2 sensor bu...

My 85 m635 has the loose green plug too. I guess it was not plugged in? I am trying to fix my odo and speedo. It was intermittent and now dead. I pulled it all apart cleaned and reassembled. No joy yet. On to the 2nd try.

I'm looking for recommendations for a Ca. repair shop that can repair and smog my euro m635. Has high NOX readings but runs great with 100k mi. I'm pretty sure a good vintage BMW shop could do it but there are few experts left it seems. I talked to Dinan and Turner and they were completely useless. ...

The gray market Federalized M88/3 engines have a cat and O2 sensor installed. The ECU is not reprogrammed but there is an external "Johnson box" circuit installed that uses the O2 sensor input to try and keep the fuel mix at stochiometric level. I found it works poorly forcing the engine t...

It allows for mixture adjustment and timing adjustments to compensate for different fuel qualities.

I'm told to get an 079 ecu. I assume that would be one from a USA version M6??? Anyone have an extra or recommend a source?
Thx
Phil

Has anyone been able to pass the California Smog check with a stock federalized M635?
Just curious if it is possible before I throw a bunch of $ at it.
Thanks!
Phil

Sad day today as we pay our respects. First time I met Wynn I was impressed how welcoming and friendly the man was. Very interesting and colorful character! And he bought Jayne and I breakfast. What a guy! He will be remembered..... Sorry I don't have the day off (Mandatory training class) but I wil...

Damn. I HAVE to be in a training class. Don't have Presidents day off:( Send my best.