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This is a long shot but I'm hoping maybe someone else has run into this.

Last year my bike was a pig to ride at slow speeds around town (10x worse than the normal ducati lug) after a lot of digging around i finally figured out that it was a failing throttle position sensor. Now, ducati's stance on the TPS sensor is that it's non-replaceable (meaning they want you to buy an entire new throttle body assembly to replace just the TPS)

So i ended up ordering an exact fit TPS sensor from ca-cycleworks. Install was super easy, TPS reset with ducati diag went without a hitch and the bike was back to normal again and functioned great. Now after only 2500-3000 kms the tps is failing again, giving very erratic readings at low throttle positions (same as what the OEM TPS was doing) which makes the bike near impossible to ride, never mind dangerous.

Anyway, wondering if anyone else has had a similar experience with the exact fit TPS sensor? Could it be something else eating them? The bike never sees ambient temps above 30 cel (i live on the east coast of Canada) and has never seen rain.

I contacted the retailer but my hopes are not high that these things carry any kind of warranty.

Just want to get a second opinion before i order another one of these exact fit TPS sensors. They are inexpensive (~$70) but if i have to keep jamming one in every 3,000kms they start to become not worth it quickly.


Thanks
 

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Think of how you ride and see if you end up spending a lot of time in a certain gear at a certain RPM. I've had to replace a TPS after 52,000K and going back through my riding habits it burned out at a certain throttle position as when leisure touring it spent a lot of time in 4th gear at 5000rpm's. That's the area it burned out at.
 

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Hey, I don't know when you posted this but I have had EXACTLY the same problem and I'm trying to think it through. It took a while to diagnose my first bad TPS problem as I was unfamiliar with the bike but now its pretty easy to tell when it's going bad.

After a few months with my 2nd TPS it started going bad and so I replaced it with a 3rd and now after about a month, this one is going downhill fast. I have yet to figure out why they are now going bad. Its a long shot, but online, these things range from $10 to $190. My thoughts at first were that the cheaper ones were perhaps made much more cheaply and simply break sooner.

I thought that these were all just standard FIAT TPS units and that no matter what you paid, you were getting essentially the same quality of item. (If anyone knows whether or not this is the case, please let me know.)

If you have resolved the issue with your TPS please let me know and I will certainly keep you posted of anything I found out. As you know, it makes for a challenging ride when these things fail.
 

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Hey, I don't know when you posted this but I have had EXACTLY the same problem and I'm trying to think it through. It took a while to diagnose my first bad TPS problem as I was unfamiliar with the bike but now its pretty easy to tell when it's going bad.

After a few months with my 2nd TPS it started going bad and so I replaced it with a 3rd and now after about a month, this one is going downhill fast. I have yet to figure out why they are now going bad. Its a long shot, but online, these things range from $10 to $190. My thoughts at first were that the cheaper ones were perhaps made much more cheaply and simply break sooner.

I thought that these were all just standard FIAT TPS units and that no matter what you paid, you were getting essentially the same quality of item. (If anyone knows whether or not this is the case, please let me know.)

If you have resolved the issue with your TPS please let me know and I will certainly keep you posted of anything I found out. As you know, it makes for a challenging ride when these things fail.
I had a couple tps related issues where I know keep an extra around just in case. It first happened about 2yr into ownership (purchased new) when it was my primary street bike, and reoccurred a year or so later. Interestingly now that its my main track bike its been perfect, going to give it another year of trackdays but I think [email protected]'s comment of how the bike is ridden may be valid.
 

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Fuel seepage past the throttle shaft gets into the sensor.
Pack the cavity with some grease before installing the sensor. Not so much that it ends up IN the sensor, though...
Also, avoid ethanol fuels when possible.
 

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Wow, that is an awesome diagnosis and makes perfect sense; thanks so much I ordered two TPS's (one for backup) and they should be in any day so I'm gonna do the grease thing. Thanks again!
 

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Did you check the voltages out of the TPS to determine it was bad? On my Microtec ECU, I can see the voltage reading in real time. Did you ever perform a reset when you installed the new TPS? The TPS circuit only has 3 wires, the voltage input also goes to the water temp sensor and the diag plug. I would check the wiring to verify nothing is shorting that can cause incorrect readings.
 

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Wow, that is an awesome diagnosis and makes perfect sense; thanks so much I ordered two TPS's (one for backup) and they should be in any day so I'm gonna do the grease thing. Thanks again!
Just curious since I'm dead in the water waiting for one where did you order they are all out of stock. I did find a private seller on EBAY that I should have today..
 

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Did you check the voltages out of the TPS to determine it was bad? On my Microtec ECU, I can see the voltage reading in real time. Did you ever perform a reset when you installed the new TPS? The TPS circuit only has 3 wires, the voltage input also goes to the water temp sensor and the diag plug. I would check the wiring to verify nothing is shorting that can cause incorrect readings.
Can you tell me how you read TPS voltage in real time please?
This could be handy to know one day.
Thanks,
Brian
 

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Can you tell me how you read TPS voltage in real time please?
This could be handy to know one day.
Thanks,
Brian
The TPS values are on the Microtec monitor page. It is not actually voltage. I believe the ECU compares the reference voltage with the TPS voltage to determine throttle position.
 
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