I dont know if this should be posted here... But my nitro car has lost ALL its engine power, it was running fine a few days ago, then i put some 20% in (because the previous owner run that through it). It ran two tanks perfectly then the next day it lost all its power, i have a video (link below) for you to see just how bad it is... Please help!

P.s In the video most of it is full throttle, and at the end when it goes fast its because its going down a hill.

Video link ----> http://www.rcuvideos.com/item/KGM3700GW6PQMZVG

Is the throttle being fully opened by the servo?

im not sure, but if it wasent how would i fix it?

In case you dont know how to see if the throttle is being opened. Take off the air filter and look down into the engine. You should see like a metal plate that is only open about 1.-3mm. Then when you pull the throttle all the way it should disappear.

IF this dose not work check your spur gear. If it is fine then move car back to factory settings and retune. Then if stil nothing maybe its time to take apart the tranny.

Alright if its not being fullopened by the servo heres what to do. Turn on the radio and the car electronics and set the trim to zero or the middle. Then find the thing i circled in red and loosen the hex nut a little. Then slide the metal thing that the hex not is attached to just until it barley touches the servo. Mine in the pic is actually in a bas postion right now. You want it closer then the one in the pic.

I circled in red the metal round peace i was talking about. IF you truck is set up diff send a pic of the servo and we can go from there.

check your clutch to. looks and sounds kinda rich as well.

Sorry to bump... Ive fixed the servo and it opens all the way, but its still the same speed, please help

Did fixing the thorttle help any?

And are you sure it is tuned right?

And is the spur gear stripped or the mesh bad? (If you are not sure give us a pic of the side of the engine where the it turns into a sprocket and then connects to another sprocket on the tranny)

Im not sure if its tuned right, it was but then i changed fue to 20%. Will i need to tune again?

Any time you change the nitro content in fuel you need to retune. Many times you have to retune day to day do to weather changes. Some times from morning to afternoon if there are big weather changes.

If you went up on the nitor content more then likely you need to richen it up.

hmm any tips on tuning?

http://www.*********.org/cars_eng-tuning.htm