I'm sorry I misunderstood your post about the "forget the baseline".. I finally understand now. I went out and started the bike it idled rough and stumbled every few seconds, so I loosened the TPS and turned it until it idled smooth. It idled about 2400 rpm. So I then backed the air intake screw down to .735. Started it up and it idles smooth with no hesitation. So far it hasn't backfired and runs good throughout the power range. I am very pleased. Thank you so much. I hope I can help someone on this forum as much as you have helped me some day. Thank you, thank you, thank you. I wish I could help you out somehow, but my knowledge of this rzr is nill compared to yours. I greatly appreciate your help.   

Thanks for the reply. I did change the plugs right after I purchased the bike. I put NGK plugs in it. This was a pretty simple fix once you look at the pictures and get you to explain it to me like you did on how to adjust the TPS. When you start the bike up without touching the throttle it will idle low. Cough once or twice and quit. So you start it again, and bump the throttle a couple times, it will idle high, (around 15 or 1600) (it will sound smooth while maintaining the higher RPM). Then after a minute bump the throttle and it will idle down. (1250) Then it will act like one cylinder misfires, just for a second. It will do this constantly about every few seconds or so. I have shaken every wire, twisted plug wires. and cannot get it to do it when I want it to. It seems to run fine (knock on wood) while driving, just only at an idle. I'm going out here in a minute and check the voltage to the TPS again and make sure it didn't change. Like I said in the PM. I pulled the plug wire off while it was idling to see if the hesitation was in once cylinder or the other and got bit with one of them through the plug wire. I will go out tonight and look at it in the dark and see if I can see a spark jumping. I thought if it was jumping that it would do it throughout the rpm range. Thanks for your help. We are getting close here... lol   Get this one,,,, I just came back inside from the bike. I've had the bed off the bike until I get it running properly for the ease of seeing what I'm doing. I was able to get the miss to stop but.............While it's idling.... If I hold my hand over top of the velocity stack for the air cleaner intake, and darn near close it off to the point that I can feel the air sucking down through my fingers for the engine to breath, it will idle down and idle smooth and sound good.  Once I take my hand off the velocity stack and it starts pulling air in through on its own it immediately starts the every couple second jerk.. Whats the deal with that? Dumbfounded now. Top end seems to be fine, just idle.

Windows XP,, it still says the file is damaged. But like I said, my stepson downloaded it on his computer and it was pretty easy to understand after I read it, But i didn't understand how to do it without the special adapter from polaris, but now i understand to just hook the red lead into the yellow wire coming from the TPS and the black one to ground. turn on the key back off the air control screw until the plate is shut, adjust the tps until i get .528. tighten screw, then adjust the air screw in until it reaches i believe .710. then your ready to go. thanks, you've been a lifesaver. I appreciate the time you have taken. hopefully this will get me back on the road. i hate to pay a dealer something i know i can find on the forum and fix myself.

I'm sure someone has had this problem before. It seems like alot of people have bought new TPS sensors. I was told it needed it calibrated but, I didn't do nothing but unbolt it and bolt it back on. I didn't buy a new one. Someone said you need to do a TPS Initiallazation but I don't own a service manual. I found a downloadable service manual online but when I go to upload it, It says file is damaged. I could take it in for service, but I don't have no way to haul it and the nearest dealer is over an hour away. The guy I bought it off of delivered it for me. Hopefully someone can give me some kind of direction. I was hoping someone could forward me the directions on how to do the TPS Initiallazation.  Thanks.

My 08 stock RZR 800, the fuel gauge quit working today. It has no codes. If you leave the key on for a minute without the engine running, the gauge will start flashing and the words FUEL will start blinking. The gauge shows empty when it's full. Any ideas where to start. I found no loose connections. I didn't get a manual with this thing. Can I download one. I can't seem to find one. Thanks.

Hello, I just purchased a used RZR 800 EFI. I love the thing, but sometimes when you are going down a hill, It will backfire real loud. It will also bog down at half throttle sometimes and miss real bad, But you can usually overcome this by pushing down on the throttle. I have checked the air filter, and all connections. I don't know where to begin. Somedays it will run great with great throttle response and sometimes it is real sluggish. Also, how do you set the clock in this thing. I have held down the yellow button for 2 minutes solid and it will not change. Any help would be appreciated. thank you.