07 FST Idle problem

[Troll-Tor]

When Cold, Engine idles fine.
When the engine temp reaches operating temp, the sled won't idle. (dies)
Spark plugs get black and they eventually fouls.

Any 4-stroke guys who knows what causes this?

 

[milehighassassin]

I'd look into the throttle body adjustment

 

[NapaMatt]

Id be looking at coolant temp sensor..

Loading up the engine with too much fuel!

 

[northstarrick]

any check engine light on? it could be a # of things. from a shorted wire, to a faulty 02 sensor. it's over fueling when hot? check your air box at the throttle body's. it may have come apart. doesn't get boost pressure. the result is very rich running.