tuning help

[roar]

hey i have a traxxas tmaxx 3.3 that i broke in like recommened i was using 25 percent nitro and it ran great almost 3/4 of a gallon thru it then i switched to 33 percent and can not get it to stay running it will start for a sec and then die i tried adjusting my high speed needle with no luck any help will be appreciated

[LUV DA AIR]

hey i have a traxxas tmaxx 3.3 that i broke in like recommened i was using 25 percent nitro and it ran great almost 3/4 of a gallon thru it then i switched to 33 percent and can not get it to stay running it will start for a sec and then die i tried adjusting my high speed needle with no luck any help will be appreciated
check the plug and make sure your ignitor is hot and charged.

[GRUBBY]

did you shem it now that your running 33%

[mbx5glen]

to high of nitro will cause the motor to miss fire if not shimed proporly.if not modded 25%is all you need higher nitro will not improve the motor.

[Rick]

I notice traxxas reccomends that you stay with the same fuel you used to break it in.