We've got a gas-powered generator, about 2KW. It seems to work - sort of. The engine pulses though (for lack of a better word), which results in very uneven output. It'll rev up, slow down, and repeat the cycle, completeing a cycle like that in about 1.5 seconds. It doesn't sputter or choke or anything either, and it starts easily, usually on the first or second pull. The engine just won't run steadily - with or without a load on it. Does the thing need a new spark plug, some fuel injector cleaner, or something along those lines? It had Stabil in the gas that was in the tank, but that's all been used, and it's got new gas in it. Is the FIC for cars suitable for something like this?