MicroSquirt.com read only forum (Jan.15,2018)

Pretty sure it's 12v on one end, ground on the other and ground to trigger on the center. It's a dummy ignition amp so you will need dwell control ON. You don't need to use the MS onboard ignition driver with it.

The fuel pump doesn't use the tach signal, but the fuel pump relay does. You can feed the relay with the signal from any coil to turn it on, or you can just use a standard 4 pin relay in the 'special' one's place.

Double check those hardware mods again. No trouble here with the older V2.2 boards running a variety of 7pin and 3pin VW ignition amplfiers. If you suspect the VB you can always wire either of those in, dwell 75% fixed for the 7pin and dwell on for the 3 pin.

What coil are you using?

Actually I think it could work if the flow meter was locked at its highest position and the lamda valve was used for total fueling control. Of course MS isn't really set up to handle this, and is assuming that the lamda valve has enough pull to vary the system pressure enough to get the car lean ...

I gave this a shot on my old CIS-Lambda Rabbit about 2, maybe even three years ago.

I ended up using dual table code to get rid of the enrichments, then went through with the stim and a mity-vac to EVERY load bin to get the calculated duty cycle to 50% (just like a normal cis-l car) with the O2 ...