If you could help me that would be great, I think it is a 3 piece cap. I'd like to have it working like it should before I start going camping again in a few months. It would also be nice to have the bigger stove at my company camping trip since all we currently have smaller 2 burner stoves. Is there a tune up kit I should order for it as well to get it working like new again?It's loosing pressure somewhere, and the cap gasket is a likely spot. If it's an older 426 with the 3 piece cap, it's worth saving the cap, and I can help you do that-in in Sacramento too.
If it's a 1 piece cap, you can replace the gasket, but it's likely easier to just get a new cap.