I have a Lightning VX and am new to the nitro world. I'm not sure what all the adjusting screws are or what they do. I was stupid and thought I could tune my engine but failed. Now my car runs like crap. I have alot of fuel coming out the exhaust and when I hit reverse on the controller trigger, my car just dies. Can someone help me get my car back to factory settings or just set the right way. The screws I already messed with are: Directly below air filter, Right above fuel line on engine and the screw that is part of that rubber bushing...I think at the end of the throttle linkage. Any help will be greatly appreciated!!