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post #1 of 2 (permalink) Old 05-14-2019, 01:50 PM Thread Starter
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Won't run without idle screw pulled out

Hi - Jason here. My '08 won't idle without the idle screw pulled out. Once I open the butterfly it runs like a champ. I read online another guy had the same problem. He said his butterfly was completely closed at idle also. He adjusted the butterfly to factory spec then adjusted tps to factory spec and fixed the problem. Has anyone else heard of this? Thanks ahead of time
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post #2 of 2 (permalink) Old 05-15-2019, 07:27 PM
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I have an 08kfx too. And i had an issue like this...check the vacuum hose that goes from the map sensor to the throttle body and make sure its not leaking...its right under where u sit in the middle of the bike.

Screw the "choke knob" out all the way and screw it back in to about 22 clicks...

Check for a good connection on the intake air temp sensor on the airbox connector and the connection on the coolant temp sensor.

If that doesnt work Change the coolant temp sensor

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