TPS failing?

[HellFire]

The bike has been performing flawlessly for two years, even after the mods, but last night it started doing something strange. As you slowly roll on the throttle, say 5th gear after slowing far enough to not have to down shift. It's like the throttle has a "dead spot" in it. As you roll on and start to accelerate it starts out fine and then just loses power right at a certain throttle setting. If you roll the throttle past this point, it catches again and pulls fine throughout the rest of the throttles range.

Is this what a failing TPS feels like? Are there dead spots in the rheostat as it fails that cause symptom like this? Maybe it's something else, got any ideas?

 

[Goblin]

Sounds like what my bike was doing before having my TPS replaced.
Try holding a steady speed. If it suddenly feels like it's loosing power and then 'catches' when you give it more throttle, it's what I was experiencing.

 

[HellFire]

Thats what it just started doing. It feels exactly like a rheostat dead spot, like when the volume drops out on a radio while turning it up.

 

[budman]

..I think the most common symptom of a failing TPS is intermittent high idle, seemingly stuck at 2,000 rpm's..at least it was on mine..a way to common problem on these rockets..if ya take the bike to the dealer, they might replace it at Triumphs cost..but if ya order it from the dealer and replace it yourself, they won't..at least mine didn't..$140.00 delivered..and ya need tuneboy to adjust it..or I guess you could use a volt meter..don't know about that..give Manayunk a call..maybe you can make an appointment, ride it up and have them change it while you wait..at Triumph's expense..

 

[HellFire]

I got to thinking about the hot weather and just for grins I leaned the fuel tables manually with the buttons on the PCIII a bar across the board. So far I haven't been able to make it act up again. I was betting it was too rich for the 90 degree heat, I hope thats all it is since I can't get the bike in to the dealer for a month.

 

[HellFire]

Since the O2 sensor is bypassed it obviously can't make corrections for itself, I'm wondering if this theory holds water or if I'm applying too much Auto Mechanics 101 to the situation. We've had our second hail storm of the season just the other day that actually damaged the MINI a little, so I'm leary about letting it sit out while at work with the pop-up storms around lately. I need to pile on some miles to be sure the problem is not just hiding and is really gone before I can say it's handled. situations like this would be nice to have that Power Commander control panel to switch programs on the fly. Has anyone actually used one of those and has an opionion on how well it works for the money? It would be nice to switch between altered tunes without digging around under the seat for the controler.