Does anyone have a problem with the petal and gear changes? Especially on the highway i have to force the petal down to change the gear just to go 5 mph more... if i step on it lightly it just idles in the same place and doesnt move unless i step on the petal hard then it shifts hard into the gear. You think its the JET chip i put in it or what. I waste MAD gas because of it! Someone please help!