I'm probably getting in over my head. I've tried removing the distributor cap but can't get it off. I have the three screws loose and when I try to lift it up, something binds on the back side (toward the engine). I thought it might just be the bundle of spark plug wire, but it seems to be something else. I'm afraid to force it off. I learned a long time ago that if a thing has to be forced it will probably break. How should I proceed? It's still raining.