throttle position sensor dead spot

[chicken strip]

I have read about the recall on the throttle postion sensor, but my problem is a little different and I have not found the thread that addresses it yet. I have a 2006 FJR1300. It runs great and I love the bike except: When I enter the twisties, I seem to have a dead spot in the throttle. I enter and when I am ready to accelerate, I have a dead spot. I am leaned over and there is hesitation while I try to find the acceleration point. The throttle hooks up and I have good surge that wants to stand me up and take me wide in the corner. It's really hard to keep a line. If I still had a wire, I would tighten up the throttle and it would be seamless, but I'm kind of stuck here. Thanks for all of your help.

 

[JamesK]

What gear are you in coming into the corner, I always drop down 1 or 2 gears before entering the turn depending on how tight it is. So typically i'm in the turn at around 4k rpm or higher - works well...

 

[Geezer]

Did you enter diag mode and run through the full range of the TPS while watching the numbers on the screen? That will tell you if there is a flat spot, or worn spot, in the TPS itself.

 

[ionbeam]

As Geezer says, the diAG screen will let you test your TPS. It is possible for your TPS to only fail when hot. A bad TPS will always fail with the throttle grip in the same position, regardless of gear or RPM. The TPS reading is only related to the physical position of the throttle plates, not RPM when you are rapidly transitioning engine power. At nearly steady speeds the TPS will cause the engine to hiccup in the same very narrow RPM range regardless of gear.

Your FJR is probably out of the normal range for the recalled TPSes, your dealer can run your VIN and it will show if you have an older design that needs to be replaced. I notice your location in CO and wonder if you have had the ECU replaced for the altitude problem. Again, your dealer can run your VIN and tell you if the recall has been done.

If your engine problem only happens when leaned over, then something else is going on. If this is the case we will be back to discuss things like the side stand switch, low fuel non concentric throttle pulley, OEM fuel mapping that causes abrupt fueling transitions and other obscure problems.