So I'm on to the next issue that I knew I'd need to deal with and hopefully the answer is as easy as I think it is...I'd rather figure this out now while I have easy access to the harness if needed for some surgery before it goes back in the car.

I've done the SAI delete with the block off plates, vacuum line loop/cap, and have the updated tune from Nubcake (thank you!) for it. Now, as many of you have probably seen, or maybe don't want to see...the wires running the power and ground for the SAI pump have an extremely brittle sheathing, I'm guessing from heat over the years. Both the power and ground wires have the sheathing crumbling off all the way through the harness up to the fuse block. Most people with the SAI delete could just unplug it and let it hang, but I'll have major issues if I do that and the SAI is triggered through the relay to get power for some reason. Long story short, can I just pull the big orange 40 amp fuse and call it a day? From what I see, you have the power coming into the harness from the white block at the ECU box, then jumping over to the SAI only 40a fuse block, then jumping over to the relay, and then the power wire out of the relay to the harness end is what is disintegrated. Only that wire and the associated ground wire are like this...must be an old hangup from earlier VW's...they were notorious for ground wires disintegrating inside of the sheathing and wreaking havoc with ground problems everywhere.

So, pull the fuse and all is good with the SAI delete tune? Y or N? Thanks for your thoughts! I'd love not to have to cut that harness apart! Thanks Jolio for donating your semi cut spare for my dissection experiment!

Power in from largest red wire here...



Jumps to fuse block here...



And red/black tracer jumps to relay here...



And shinier red wire that is disintegrating out from relay to SAI connector...