Running/Idle problems after PAIR and flapper removal
I was lucky enough to find a gently used '03 a couple of months ago that I scooped up quickly. I put it up on stands to do various mods to it but would start it every few days because the exhaust note is sweet (Ti Banzai-mount Satos). This week's project was the flapper mod and PAIR system removal. I used the block-off plates and cover from Kyle Racing and put things back together last night.
When I tried to fire the bike up it didn't want to start, so I gave it some throttle and it fired up; however, once I let it drop to idle it died. Starting it with the choke on kept the idle high enough that it would continue to run on its own, but when I blipped the throttle it would die again. I thought maybe I had a vacuum leak someplace but couldn't find anything obvious pertaining to the parts I had removed. After tinkering a bit I tried again with the same results, but decided to let the engine warm up this time. As it turns out once the temp comes up it idles and seems to run fine, but I'm paranoid now.
I did some reading and a few things stand out as possibilities - vacuum leak, TPS, FPR, PCIII, water/debris in fuel, etc. Before I tear the thing apart again though, I wanted to see if anybody had some more specific advice or similar experience I can learn from; I'm not afraid to work on things but sometimes I don't know what I'm looking for and the service manual is less than helpful in my opinion. I didn't remove the tank to do this work so it's possible when poking around with such little room I bumped or jarred something that would explain everything. Any assistance is appreciated. Thanks.