TPS adjustment questions

ktmguy

ktmguy

i'm facing some idle issues recently and i think they are related to the TPS settings. When the engine is
hot sometimes the engines dies waiting at a intersection or red light.
I have already balanced the throttle bodies and tried to correct the TPS voltage, this helped to let the engine run a lot smoother and with less vibrations, but did not cure the idle issue. In fact it still dies from time to time
but what is even a bigger problem now is that in first and second gear the revs drop a little bit slowly back to idle.
Feeling is a bit like an electronic slipper clutch ... As soon as i engage the clutch they drop as fast as before, seems
to be related to the clutch switch.
Question is now if i did the procedure correct, do i set the 0,6V when the enginge is hot just with ignition on, engine not running or must the engine run for that ???
Before i touched the whole thing i had 0,64V and now i think i have 0,57V after my adjustment. Is a little bit tricky to get to 0,6V exact. All measured with Tuneecu. I think i will now drill a little hole in the Airbox to be able to adjust the TPS with the throttle bodies mounted, otherwise its really a pain. I'm still using the lower part of the airbox to protect the bodies.
ktmguy

ktmguy

In my opinion it is very hard to do the TPS adjustment on voltage alone.
the best results I had was to put it back to where it was. I marked it so that made it easy.
Try to adjust it with engine hot to 0% opening in tuneecu, not on voltage.
You can also do it by feel as when it's to high the idle shoots up eratically and when too low it stalls.
I mentioned this before, only mess with the TPS if it is really needed and if you have watchmakers precision in your fingers.