Replaced TPS, bike runs worse!

[mtrdrms]

So I had the telltale surging and thought that I would try the TPS per the sticky post.  Went great until I started it up and drove it around after.  First off the idle seemed a bit high once it warmed up - maybe 1500 rpms.  Then once I put it in gear with the clutch lever pulled in it jumps to about 2000 rpms.  So I took it for a ride to see what that would be like and if it was snatchy before it is downright jerky now!  I disassembled/assembled with the triumph manual and I don't think I forgot anything.  Do I need to take it to the dealer to have the TPS reset now?  Most post I read say this isnt required.

Any suggestions?

Thanks

Andy

[Timbox2]

Ive never done this so cant really comment, in Bixxer Bobs original post he didnt need to reset the closed position, but the Haynes Manual says on replacing it always needs reseting by Triumph Diagnostics, so, you could try a 12 Min Tune, but I dont know whether that will reset it or not, somebody will be along soon with more knowledge on this im sure.

[ChazzyB]

If the TPS has been disturbed or replaced, it really needs does resetting. Essentially, a reset is saying to the ECU, "the voltage you're reading right now is the throttle closed position". A fraction of a volt difference from old setting to new and the ECU is going to be fed duff information...

[mtrdrms]

If the TPS has been disturbed or replaced, it really needs does resetting. Essentially, a reset is saying to the ECU, "the voltage you're reading right now is the throttle closed position". A fraction of a volt difference from old setting to new and the ECU is going to be fed duff information...

That sounds right.  Does this need to be done by the dealer or is there another way (i.e. 12 minute tune)?

[Mustang]

try the 12 minute tune it's easy enuff to do .................

start the bike
let it idle
after the fans turn on let it idle for 12 minutes
touch nothing , in other words don't give the ecu any inputs like brake clutch etc
shut it off with the key
all sensors will be reset to default
now it will start relearning trim settings as you ride

[mtrdrms]

try the 12 minute tune it's easy enuff to do .................

start the bike
let it idle
after the fans turn on let it idle for 12 minutes
touch nothing , in other words don't give the ecu any inputs like brake clutch etc
shut it off with the key
all sensors will be reset to default
now it will start relearning trim settings as you ride

Thanks Mustang, I'll do that in the morning.  I also just found the cable that hooks to the OBD port on this bike in the box of stuff from the PO.  The program download looks like a chore...

[mtrdrms]

12 minute tune didn't work.

[metalguru]

Couple of options here, ride the bike around for a few days going through cycle of hot cold and run ie, normal use, as it takes a while for the ecu to learn, it is a bit on the slow side.
Second is if you have the OBD lead and access to a laptop then down load TuneECU and reset the TPS that way, after all it is free and not as complicated as it looks, just follow the instructions for the part you are doing as reading all can confuse.

[mtrdrms]

Ok so, I reset the tps using the tune ecu software and that fixed the high idle issue.  I have been driving it around and it really has not gotten any better as fas as the hesitation at constant throttle.  If I roll on the throttle it goes away and the bike pulls well.  If I am just cruising, especially at lower speeds, it hesitates and jerks around like crazy.  Any suggestions?  I am now able to work in the tuneecu software so thats an option but i really don't feel comfortable with it yet to mess around.  

Andy

[Bixxer Bob]

If it is worse after you changed the TPS and resettting the TPS position didn't solve it, then it's one of three things:

a. Somehow, you reset the trims.  riding it will re-learn then in time.
b. You left a sensor or pipe off when you put it back together.
c. You have an air leak now that you didn't have before.

[Mustang]

about friggin time you showed up ................

  bob

[Bixxer Bob]

:lol:

Thanks!  What with broadband thats slower than dial-up, learning about 28mm gravity feed solid fuel heating systems, trying to work out when and when not the new building regs apply to listed buildings and trying to prevent the son-in-law blowing the house up (he lit the wood burner without first enabling the circulation pump - boiled the heat exchanger and damn near blew us all to hell) it's been busy.

I should be able to pop in a bit more in future if the telephone company ever get this damn broadband fixed.  I have a sync speed of 4.5mb but the IP profile is locked down to 135kbps and won't budge.

Sorry for the hijack....

[metalguru]

Ok so, I reset the tps using the tune ecu software and that fixed the high idle issue.  I have been driving it around and it really has not gotten any better as fas as the hesitation at constant throttle.  If I roll on the throttle it goes away and the bike pulls well.  If I am just cruising, especially at lower speeds, it hesitates and jerks around like crazy.  Any suggestions?  I am now able to work in the tuneecu software so thats an option but i really don't feel comfortable with it yet to mess around.  

Andy

OK need a few more details now.
When the TPS was replaced was the throttle body to head gasket replaced?
What year, mileage, service frequency, any mods like exhaust.
What map is installed, this is on TuneEcu on the maps page ECU INFO, should be a 5 figure number.

On the TEST page what is the Long Term Fuel Trim set to?

On the Diagnostics page what is the TPS voltage?

Has this problem just occured or has it developed?

[metalguru]

:lol:

Thanks!  What with broadband thats slower than dial-up, learning about 28mm gravity feed solid fuel heating systems, trying to work out when and when not the new building regs apply to listed buildings and trying to prevent the son-in-law blowing the house up (he lit the wood burner without first enabling the circulation pump - boiled the heat exchanger and damn near blew us all to hell) it's been busy.

I should be able to pop in a bit more in future if the telephone company ever get this damn broadband fixed.  I have a sync speed of 4.5mb but the IP profile is locked down to 135kbps and won't budge.

Sorry for the hijack....

Hi BB
Good too see you back again,
Those systems can be testing but at least you had thermo syphon to fall back on so wood burner hopefully didn't get too stressed!!
Lots to be said for blow off valves.
No hijack at all good to see ya.

[Bixxer Bob]

All good points if you're trying to fix surging MG, but the clue for this one is in the original post:

...  So I took it for a ride to see what that would be like and if it was snatchy before it is downright jerky now! ...

Somehow he made it worse so he needs to put that right first, then work on the surging  

I'll pop in again soon and see how you're getting on :lol: