Reply To: Miss and backfire under 5k only after engine warms up – 2009 GT650R
Ok here is something for you. With the tps something is a bit bent where the bolt goes through. Maybe from the heat. I thought I would try turning manually, I will check it with the multimeter. Anyway I slowly turned it up, it started to idle better and rev mostly without a cough. Then I tightened it in that spot. Still getting a slower idle 1,000-1,100. Start it again and still playing up a bit. It must move when tightening because I loosened the bolt move it and running good again. I’ll try and find another tps. I’ll also take some video to show you. I think we are hopefully heading in the right direction
Double check the throttle body too, make sure the “threads” where the screw goes in to isn’t damaged otherwise , if it is , do a HELI-COIL mod (youtube “heli coil”)