need help bad!!!

[FMFBlaster240]

hey guys my blaster was running fine for a day after the new piston and everything, and then the next it starts right up idles very well the first few seconds. then it just starts winedin up almost like it was at full throttle in neutral. any suggestins on what is causesing this to idle so high up?

 

[yzrider]

well, could be the tors, but i have a question for u, did u break the top end in right??

 

[scotj77]

sounds like you have a massive airleak. must do a leakdown after rebuild or taking a high risk of burning up your new top end. breakin is a must too or the piston will not get heat treated properly and expand too quickly in comparison to the steel jug and seize up

 

[FMFBlaster240]

thats guys i sprayed carb cleaner on the engine while it was ideling high to see if it would go down after spraying it, so i dont think it is an airleak at all thanks tho u guys were a big help.

 

[98blasterworked]

u might still have an airleak... check ur gaskets, intake manifold, all points of connection.... also did u break in the top end.... if not then it might not be jetted right

 

[xJust_Causex]

airleak f the 15