TPS test and replace

After putting up with a very bad hesitation on light throttle after crushing Between 2000rpm and 2500rpm I reloaded the tune in the ECU and the map in the PCV but the problem is still there as bad as ever so it's time test and or replace the TPS.
After loading the tune and doing the 12 minute tune the TPS green light has not come on.

Can the TPS be checked with Tune ECU or does it have to be removed to test and what is the cost is new primary TPS.

Yes. You need to do the ISCV reset in TuneECU after replacing the TPS

Cost is about $135 last time I checked

Ok I know nothing about the PCV but reflashing it should not hurt anything. So you reloaded the evu tune via tune ecu. Then you reset the adaptives and you cycled the ignition key turning off for 5 seconds and turned it back on.

Then if it was a different tune I would link back up with the ecu anverigy a new tume has been installed. If I rrload the same tune I change the name of it before I reload it by just adding the date to the tume name. This makes it easy to see if the tine is different and allows me to remember when the latest tune was loaded.

Once I have done that I rin tje ISCV test/reset. I say test because I am verfying the idle stepper motor, and TPS are within spevifications. IMHO doing a 12 minute tune before verifying the tps is within tolerance is a wastr of time in fact about 30 minutes wasted if you end up having tovadjust the tps and or the idle stepper motor. If everything is good the you can do the 12 minute tune if you desire.

It does sound to me that you might a worn spot in the tps at say a position that is used a lot cruise area where you just make minor throttle changes a lot like on the highway and well you might use that 2000 to 2500 rpm area more the anywhere else. But before changing I would check the low trnsion leads to the coils vibration could put a miss in thats harf to chase down. The spaxe connectors get loose and only need a little squeeze with needle nose pliers. I would also look at your map to see if this is a F TABLE TO L TABLE SWITCH POINT. If it is you also could have a vacuum leak make a note to pay attention to the map pressure signals on each cylinder next time uou gire it up to see if any throttle body balancing is needed. It seems like a lot of prchecks but if nothing needs to be adjusted it takes little to know time to perform these test exvept for cheving the low tendipn leads yo the number 2 coil which is under the mess of wire connectors up front where the yoke is. Myself I pull the plate on top of the coils as it is only there to hold everything pretty like and I tossit in yhe bin. Next time it will take no time at all to check the front coil leads.

LIKE I said my bet is PRIMARY TPS. EASY JOB BUT DO NOT OVER TIGHTEN IT. I think the torque is only 2 to 3 Newton Meters NM.


if tps light is not green my bet is you werr not reconnected with the ecu a simple fan test will verify that.

Timely post, I have the exact same issue, I also suspected TPS, as it is low RPM, but seems more keyed to throttle position than exact RPM. Luckily I have a new spare never installed.

Tripps said:

Timely post, I have the exact same issue, I also suspected TPS, as it is low RPM, but seems more keyed to throttle position than exact RPM. Luckily I have a new spare never installed.

Click to expand...

Ya it sucks typing all that on my phone.

How I test the TPS is to after connecting TuneECU and you have the connected green light switch to Diagnostic page at top right of screen you see on this page a taco and three gauges the top one is the TPS slowly twist your throttle and you will see it change its values now start the bike (you will have to put the light fuse in if you removed it once you ave bike running slowly bring revs up to problem area if there is a problem you will see the voltage changes become erratic or jumping around and you need to replace the TPS.

Next thing after changing the TPS you will need to switch to the Tests page after connecting, there you will find down the bottom of the list on the left side "adjust ISCV" double click this and follow the prompts to adjust the TPS and also check the stepper motor setting it is important that this is set correctly at 0.6 for the TPS and 0.72 for the stepper motor.

My first and original lasted 40,000km then the next only lasted 15,000km the third is still going great 20,000km so there is no real measurable life span

I contacted two Triumph shops, after two days one answered, the Primery TPS are on back order, about three weeks away and around $210.00.

T1245113 Throttle position sensor

I thought it was the secondary TPS that usually went? And does that control the secondaries, like it sounds? (and I no longer have)

I think the one you need is only about $125, or was, I had them reversed in my head.