Hi Richard, I'm going to install the HFS-3 on an audi s2 ABY, and my question is if you know what wire I need to cut to install the fail safe, boost cut, and what wire is the inj#1
I think the signal inj#1 that I need, It's pin 36, is it right?
For the boost I have a external MAP sensor, because don't want to weld one wire on ecu, do I need to cut the boost signal wire and intercalate white and brown wire after blue wire??
I attach you a little scheme of the injection
http://www.s2central.net/S2_Schematics/B/B73-04.pdf
Thanks!