Hi Sean! I haven't had the time to make an write-up yet but I'll try to describe the procedure in short. Splice the power wires from the second MAS to the original harness on the first MAS. Take the signal wire and the signal ground and run it in a shielded cable to the AFC. Here's a picture that somebody made and I corrected (note the pic zhound posted) You can also take a look at Damons description in this thread: [ http://www.twinturbo.net/net/viewmsg.aspx?forum=main&msg_id=660724 ] The red cross in the picture symbolises that the ECU ground is not the same as Engine ground. You have to look at the schematics to find out which pin is the signal (goes to pin 27 on ECU) and which is the signal ground (goes to pin 26 on ECU). Attach the signal ground to the shield at the MAS and to ECU ground at the ECU. If you've got a dual POP program, set the AFC to: Sensor no. IN=2 OUT=2 Sensor cal. IN=2 OUT=Ave That's it. Good luck!
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