2001 GSXR 1000, 2019 Hyabusa
Bike sat for a bit was running fine before that, suddenly would try and start but not. I checked the fuel tank and it looked like the tank coat had dissolved.. cleaned the tank, replaced the fuel pump, replaced the injectors, cleaned the fuel rail etc. (new plugs) on test the bike started without the air cleaner assembly on and I thought all was good. Once I plugged everything in it would not start. I tracked it down to the IAP sensor, once I disconnected the vacuum line to that sensor it started right up but a bit rough. If I totally disconnect the IAP sensor and the AP sensor under the seat it runs fine. I replaced the sensor same problem, I actually got two off Ebay and tried both and no go.. same thing. I tried using the rear one in place of the front. Same deal. I've seen a few threads about something like this but it seems it always ended with the guy forgot to attach the vacuum line (this is not that).