Primary TPS bad?

[Furious]

Hey Guys,

So for the last year I've been trying to track down a throttle problem on my Rocket.

I finally got around to checking the idle stepper, but when I try to adjust it using Tuneboy to watch the voltage, the voltage never changes (This happened with the original and a new one I bought from Triumph). Would this be indicative of a problem with the primary TPS?

Thanks,
Jake

 

[Blastedbones]

1.) Do you have high idle issues - approx. 2000 rpm?
2.) Are you checking the ISCV stepper with the bike running, or just with the key/kill-switch on?

(Also, TPS issues can show as erratic idle issues, stalling intermittently at junctions due to revs falling below sustainable idle).

 

[warp9.9]

Think of it as a bad rheostat. sometimes it looses it position like a section is corroded. other times is looses its zore position and sometimes cuurent jumps across several layers at once. Pull it off and install a new one !!!!

 

[Furious]

1.) Do you have high idle issues - approx. 2000 rpm?
2.) Are you checking the ISCV stepper with the bike running, or just with the key/kill-switch on?

I don't just have idle issues, I have throttle issues. I can ride the bike in 5th at 45 mph with my hand off the throttle. Let me tell you, it's not a feeling of safety.

Idle starts off fine but throttle stays up to a degree after you twist it. Tuneboy shows that the throttle is always engaged between 1.5 and 7.x% depending on how much you play with the throttle at idle. Full twist goes shows 100% throttle.

I've been checking the stepper with the motor off.

 

[Blastedbones]

I don't just have idle issues, I have throttle issues. I can ride the bike in 5th at 45 mph with my hand off the throttle. Let me tell you, it's not a feeling of safety.

Idle starts off fine but throttle stays up to a degree after you twist it. Tuneboy shows that the throttle is always engaged between 1.5 and 7.x% depending on how much you play with the throttle at idle. Full twist goes shows 100% throttle.

I've been checking the stepper with the motor off.

The throttle maintaining power ( riding with your hand off it) is a symptom of 'high idle' ie it's not settling down to 750revs ( or whatever you have it set to) or it takes a number of seconds to settle itself after you take your hand off throttle.. This is definately TPS

 

[step1]

Definately TPS.Same happened to mine.If i switched the bike of and then back on again it would idle ok and then all of a sudden it would high idle.

 

[Furious]

Definately TPS.Same happened to mine.If i switched the bike of and then back on again it would idle ok and then all of a sudden it would high idle.

Step1, this is the same thing I was having to do the last time I rode it.

Okay, thanks guys. TPS is next, then.

 

[step1]

Make sure when you get the new TPS that it is the new one.They have upgraded this part.

 

[Blastedbones]

Make sure when you get the new TPS that it is the new one.They have upgraded this part.

New upgraded ones have a different parts code to the older ones & in the buisness end, the potentiometer 'teeth' sre coloured blue ( old are black) mention it to the dealer to see how familiar they are with it.

 

[tdragger]

Primary TPS are very hard to come by. Been waiting nearly 3 weeks for dealer to get one from Triumph NA. I guess they had to get some from the old country and put them on a 3 masted sailing ship.