i know pin 85 is the obdII on the 3 plug and diagnostics is 100
and i think its 79 ya want on the 4 plug, some one else can verify/ correct me if its wrong,
wish i could be more help bud
ooh shit i meant 76 not 79 fat fingers and phones dont mix, but yea after reading the link above it Does make more sense to do it off the rear lamda or 75,
Alex,
just swap your boost logging input wire once you have your desired boost set with your AEM logging input wire mate . You don't need your boost logged at all times. There is always a boost gauge to monitor.