Primary TPS bad?

Furious

Standard Bore
Joined
Sep 14, 2007
Messages
4
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
 
PowerTripp said:
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?
Click to expand...

(Also, TPS issues can show as erratic idle issues, stalling intermittently at junctions due to revs falling below sustainable idle).
 
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 !!!!
 
PowerTripp said:
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?
Click to expand...

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
 
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 said:
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.
Click to expand...

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

Okay, thanks guys. TPS is next, then.
 
Make sure when you get the new TPS that it is the new one.They have upgraded this part.
 
step1 said:
Make sure when you get the new TPS that it is the new one.They have upgraded this part.
Click to expand...

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.
 
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.
 
You must log in or register to reply here.

Similar threads

bad cooling fan need to replace
Replies
9
Views
496
Mongler07
Operation overhaul starts, first on the menu, TPS settings at closed throttle.
Replies
4
Views
259
Zanx
Bad idle in neutral
Replies
0
Views
377
r3badboy
Error Code P0122 - TPS
Replies
2
Views
696
spb2002
Possibly TPS failure?
Replies
7
Views
999
Gregger
Menu
Log in
Register