* Fuel starvation: If the engine is not getting enough fuel, it can cause the throttle to stick open. This can be caused by a clogged fuel filter, a faulty fuel pump, or a problem with the carburetor or fuel injector.
* Air leaks: An air leak can cause the engine to run lean, which can also cause the throttle to stick open. This can be caused by a cracked or damaged intake manifold, a loose hose clamp, or a bad gasket.
* Carbon buildup: Carbon buildup on the throttle body or intake valves can prevent the throttle from closing all the way. This can be caused by running the engine too rich, using low-quality fuel, or not changing the oil regularly.
* Mechanical problems: There are a few mechanical problems that can cause the throttle to stick open, such as a broken throttle linkage, a damaged throttle return spring, or a worn-out throttle shaft.
If your motor is sticking at wide open throttle, it's important to have it diagnosed and repaired by a qualified mechanic. This is a serious safety issue, and it can cause the engine to overheat and damage itself.
