truck taking off upon start (idle)

[dustypants88]

idk what i did but when i start my truck it starts rapping up really high right away and just wants to go. what did i do wrong and how can i get it to just idle again?

thanks in advanced
Dustin

 

[BamaFan]

Are the wheels spinning when your trying to crank it? Take your air filter off and make sure your carb isn't open to much. If the wheels are spinning while your trying to crank it your clutch shoes are wore out or the spring is broke. Your lsn may be too lean also. There is numerous reasons maybe a little more info could help us help you. Could be your throttle servo needs to be re adjusted it may be opening the carb too far. The throttle trim on your remote may have gotten messed with also opening your carb up too far.

 

[Racer 1966]

First thing is to check/adjust the throttle trim knob on your transmitter.

 

[BamaFan]

Are the wheels spinning when your trying to crank it? Take your air filter off and make sure your carb isn't open to much. If the wheels are spinning while your trying to crank it your clutch shoes are wore out or the spring is broke. Your lsn may be too lean also. There is numerous reasons maybe a little more info could help us help you. Could be your throttle servo needs to be re adjusted it may be opening the carb too far. The throttle trim on your remote may have gotten messed with also opening your carb up too far.

Also check your remote it should have a 50/50 and a 70/30 setting if you switched it to 50/50 and it was on 70/30 without re adjusting your your servo horn that will make it rev up cause it's opening the carb more than if it was on 70/30.

 

[hamz9561]

Also sealing the engine if you haven't already is a good idea, because it could be an air leak as well.

 

[cosmos_449]

adjust the idle screw for a 1mm gap