Ok guys, I have a very similar problem with my 03 F5, and do not mean to hijack the thread, but I wonder if we aren't seeing similar stuff.... When my sled runs for a while and/ or in warmer conditions, it seems doggy, like the power valves are not opening- but not as drastic like you guys indicate.
YES the power valves hve been cleaned, cleaned, and cleaned again and are functioning. When the APV's are stuck, it is more severe, so it seems different. When my sled is "cold" or in colder conditions, it (the engine) feels good and pulls hard and turns about 8400, but when it gets into it's "bitcy" mode it feels doggy and will only pull about 8000 and the seat of the pants feel is noticeable. I have gone down to 340 jets, changed clutching (to ODS) and the problem has followed. One minute great then the next :turd: .
I obviously am thinking that the pipe sensor could be a route I need to explore as the culprit for my sled- same as you guys. I guess I need to do some testing,,,,, wish i had a buddy with an F5 to try it out. I am also curious as to whether the light should be coming on- since I have a 04-05 white speedo in the sled and/ or maybe the check engine light is burned out...... so many things to consider. Just thought I might share my experiences and get some more input/ discussion going.