Your descriptions are identical to my buddies complaint, let me know what the new TPS does so I can relay the info to him.
 
Yeah.. I thought I was all alone.. now there's 3 of us!.. lol

If it turns out not to be the TPS, I will probably check valve timing, but I just don't think that is it. ( I say probably because I have 2 teenagers in sports.. and it takes forever to find the time.. :)
 
Good News

I got out the ohm meter and checked the TPS. Between the 3rd leg (wiper) and either pole I can read either the high or low end of the potentiometer's resistance. Then, by slowly rolling the throttle a progressive reading is apparent on the meter's scale. I saw a jump towards the open throttle position near the 1/4 throttle area. This didn't seem right at all.

To be sure this was the problem, I traveled to meet a fellow R3 owner. His primary TPS did not behave this way, but showed a steady climb in resistance when reading the wiper and resistor contacts while slowly rolling the throttle.

This afternoon I'm headed to the nearest Triumph dealer with my sputtering clunking Rocket to install a new TPS and reset it with TuneECU (bringing my laptop).

It makes sense that an error code would never arise if the jump in resistance was always within the range of TPS's impedance scale. So, the computer thinks it's seeing a fast movement of the throttle towards WIDE OPEN around the idle-to-1/4 throttle TPS positions.

I'll keep y'all posted!!
 
Thanks for the update.. :) I will be ordering a TPS this week also.. I'm eagerly awaiting your out come.. :)

So if you're taking your bike to the dealer to have them install the TPS, why are you bringing your laptop to reset it? Triumph's ECU tool will do the same thing...

PS.. I hope your dealer has one in stock. My dealer has nothing in stock and recommends that order through BikeBandit.com..
 
Fantastic news for you, TxRIIIRider!

This bike runs like new again!!! :D

The dealer had it in stock, I called first. The mechanic on duty says he changes more TPS's than he'd like to admit. (btw, it's actually not a Triumph part, but one Keihin uses on their Throttle Bodies. He said that many bike manufacturers use that same TPS.)

The price w/ tax was $137, which is the same price I saw at BikeBandit.

I brought my laptop so i could change the part myself in the parking lot and have a good ride home. After I was finished, he opened the door and pulled my bike in and hooked up the Triumph factory tune equipment anyway (free of charge cuz these folks are REALLY COOL PEOPLE :cool:). He then adjusted my Idle Air Control stepper motor, which wasn't too far out but received a fine adjustment anyway.

If ya do it yourself, just open up TuneECU's diagnostics page and read the voltage measurement of the TPS (it's the upper one of the 2 displayed). The TPS is adjustable and must have its mounting bolt tightened at a voltage reading of 0.58 to 0.62 volts. It's a little touchy. You'll need a #25 torx bit, or torx wrench.

Hellraiser was right -change the TPS!

Automotive TPS's last for hundreds of thousands of miles, but are about 5 times the size. Hopefully Keihin has upgraded the integrity of these things, cuz I'd HATE buying another at every 21,000 miles!!!
 
Did you ever get your bike straightened out?

I've been having the idle issue with mine again. When it is warm, it idles around 2000 but if I flip the kill switch really quick, it will idle down just fine. I've put 2 TPS's on it in 4 years . . . I'm taking it to D&D on Saturday . . Tuesday they are going to do a diagnostic on it and evidently Triumph will be running the diagnostics via the internet . . .
 
That's cool that your dealer can do that.. and Triumph will be seeing it over the Internet? That's cool too.

I think your bike's symptoms point to the idle stepper motor, not the TPS. That is the 1st problem I took my bike to my dealer for a couple of years ago. They said they couldn't duplicate the problem yet when I started it in their parking lot it was idling at 2,000 RPM. They charged me $180 for labor (riding my bike). I rode it home like that. Then I decided I couldn't screw it up any worse, so I backed off the adjustment nut on the idle stepper motor until it was idling about 850 RPM, and that was that. Never had that problem again.

Still waiting on my TPS from BikeBandit.. so no progress yet. Well, my tires are lasting longer!... :) However I did receive most of my parts ( seals to rebuild petcock and one idle screw spring ) for my Trophy 1200, so I might be able to get it going soon.
 
Back
Top