09 600 EFI Hesitation

[hoov165x]

I have an '09 RMK 600 that has a significant hesitation in the fuel delivery system when I first take off. When I shut it down for a break at the bottom of a hill, then start it up a few minutes later to take a run at a hill, there is a stuttering/ hesitation before it picks up and runs right. Bad deal when climbing. Best to run it around at the base (if there is room) before making an attempt. When the sled has been run 10-20 seconds or so, it runs fantastic. Been this way since new. Anyone else with a CFI 600 with the same problem? ECU?

Thanks in advance.

 

[BB454]

Stock pipe? Take it in and have the TPS checked.

 

[hoov165x]

Stock pipe, yes. I do have a TPS checking tool, I believe. I will give that a shot, however, seems odd that sled does it after cooling a few minutes. Maybe EPTS has something to do with it?

 

[MARV1]

Won't run properly unless properly warmed up, never try to hammer it after sitting for a few minutes, coolant cools quickly in tunnel...

 

[hoov165x]

I'm not talking a cold pull here. Sled essentially at operating temp. Even if I've only been sitting a few minutes I let it idle for a minute before starting out. I guess I should say this is not only a WOT issue, but happens under a bit of a load at less than full throttle as well.

I've been sledding for 45 of my 47 years (started in front of my dad on a late 60's olympic) so you are going to have to assume I'm not a total dipsh*t.

 

[MARV1]

Minor adjustments on the cfi throttle bodies, even the cable adjuster make a difference in how these things run. Try adjust the throttle cable at idle by extending it slowly, turn out until it shuts off then back it in a turn. Restart and try it out.

 

[hoov165x]

Thanks Marv.