Inconsistent and high idle

[walker1328]

I have a 12 Pro with a boondocker turbo on it, when i start it with a cold motor it idles around 12-1500rpm and have to feather the throttle to keep it running. Once the sled warms up (usually around 100F) it idles up to 2500+ rpm. When I come to stop from riding it only idles down to about 3200rpm and after 10-15 seconds it will come down to 2500. I had the tps replaced and calibrated and I'm still getting the same thing. Runs like a top other than this issue, anyone have any suggestions on where I should start looking?

Thanks

 

[Scott]

Sounds like there is an air leak or seal broken somewhere.

Could be:
Crank seal
Base gaskets
Intake seal broken
Reed petals chipped up

 

[MrIQR]

I'm having a similar problem..

Wouldn't a chipped reed cause low idle not high?

When I had reeds chip and crack on my carb'd sleds made it want to foul plugs and idle low/stall/flood.

Would the ecu be able to adjust for the extra fuel and increase the idle to adjust for it?

 

[Scott]

I've seen more of a low end fat condition with bad reeds. Too much fuel gets through them so It's actually not likely to be a high idle.

 

[walker1328]

I tried checking for a crank seal leak with propane and couldn't get it to idle up, so I think I can rule that out. Looked all around the base gasket and looks good. Tried getting in around the throttle bodies and still couldn't get it to idle up. I'm thinking that the leak has to be between the reed gaskets or the throttle body adapter? For it to idle up the leak has to be between those points, right?

 

[walker1328]

Well I think I have it figured out. I did some more research and came across a thread on snowandmud that said if you have a boondocker box and ebc to disconnect it at the TPS and at the main connection to the box as they were getting erratic readings with it plugged in. I disconnected mine and reset the TPS to factory specs, plugged it all back together and now it seems to be idling perfectly and reverse is working.