318ti.org forum - M3 cluster MPG gauge

I just put a M3 gauge cluster into my 330ti. The MPG gauge cluster doesn't work correctly. Does an one know how to get it to work? Stephen, of the Alasks blue 328ti fame, had a brief post about it, but it's not detailed enough for me. See below:

Hey guys,

Things have been busy here so I haven't had time to update you all.

Today I spent most of the day installing the new instrument cluster (from M3). I removed the glove box assembly, airbag and steering wheel. I ran the diagnostic cables (RXD & TXD, the "ti" does have them) behind the dash and spliced them into the ZKE control module. I also ran the wiring to get the MPG gauge to work. For this, I had to run the wiring out through the firewall on the drivers side and install it with a pin in the X20 connector (Big round plug next to fuse box).

Since the "ti" does not have any instrument diagnostics, the only test I had was to code the cluster with the modic. It worked perfectly with no hitches (I had to get all the coding codes from a 328-). After everything was completed I connected the car to the DIS (BMW's diagnostic computer) to clear the SRS fault. At that time I did a fault test to see why the "Check Engine" light stays on. It listed about 5 diiferent faults. I cleared them all and the only one that came back on was a O2 sensor fault. I'll have to see whats going on. Maybe I have a bad sensor.

Now the tach doesn't go in a big circle when I accelerate. On the way to work this morning I decided to see how fast she would go. When the rev limiter kicked in the speedo was showing 133mph. Given the the 328 is limited to 128mph. I would think the speedo was a little off, which is normal.

Thats all for now. Next I hope to have the battery cable run. I didn't get any response from European Car. Maybe i'll try Roundel.

Anyone know........J!m maybe?