My Revo 3.3 was running and idling great, then I jumped it, it did a few cartwheels, landed, and shut off. When I went to restart it, it would only run if I gave it gas. I turned up the idle so high the truck won't stop moving, but it still won't idle unless I give it gas. The engine has about a half gallon through it. Any help will be appreciated. Thanks in advance!