fuel cap light comes on

Thinking of your concern, I cannot come up with a correlation between a hard start and a fuel cap light being on. Your fuel cap light will general stay on when either your cap is not fastened securely, or you have a leak in your evaporative emissions system. These leaks typically do not challenge starting your car. All the same, I would still strongly recommend you check for codes in the engine's computer, as they will register one or more for that light, and you may get some clues to your difficult starting that way.

I agree with dave. But if you would like a second opinion we would love to help you out, So feel free to give us a call at (877)382-0815