I know its working, but I don’t know if the pull up, pull down etc.
I just contacted Marc and he reminded me that that channel was setup and ready for me.

I am not near my car and diagrams for a few weeks, if you wish I can look into it when I’m around it and let you know the settings

I found some more issues and it seems perfect now.

First were the odd timing numbers for the Idle settings that you had seen. It looks like they were corrupted somehow when I did a software update.
I found all the old timing and IAC settings that Marc had sent with the ECU and plugged them back in ...

Thank you for the info.
I have been gone for the past month and now can try your suggestions.
I will post the results.

Thanks again
Scott

Here are two log files.
the first one is cold and it starts up has a mild rpm oscillation but stays running when the ac compressor kicks on. Warms up and is fine

the second one is about a half hour later, you will see it starts and then dies when the ac clutch kicks in. does it again before it ...

Running VEMS PNP on AAN 1993 S/4
Car starts cold perfectly and has a high idle as set in IAC control until 80c. No issues runs great hot and cold

But...Start the car warm and it fires right up and then dies about 7 seconds later. it sounds like when the AC clutch engages. The only way to keep it ...

It was the complete kit from Zeitronics. I wanted the display, but yeah you can get the frequency output and use the wheel speed method that I don't know how to do
I have the display mounted in the ashtray so I can fill up and get the blend I want. Usually drive around the block and go back to top ...

The problem has been solved by the EFI Express guys.
Pin2 on the econosel connector had backed out of the connector.
Plugged in and all good.
The Zeitronics unit is communicating perfectly and the anytrim now works as designed.

Hello Guys, I have searched for this and cannot find it.
I have a 1993 Audi S4 running the VEMS ecu. I have a Zeitronics flex fuel unit that gives a 0-5v signal for the ethanol content.
I just hooked it to the input for Anytrim Fuel trim on MCP3208Ch1 and am getting 1/2 the voltage showing in the ...