[curtis73]

Since your car is EFI, revving it won't help it warm up and its slightly bad for it. Not terrible, but there is absolutely no reason to do it. The other things like flooding and electric would be more steady problems that would have other symptoms. You shouldn't have to do anything with the pedal to start it. Just turn the key and it should start in a couple seconds.

The problem is elsewhere. Since its just running rough its very difficult to guess what's wrong without driving it, but since you have a check engine light, the first course of action is to take it to major chain parts store and have the codes checked for free. Don't pay for it, there is always a parts store that will do it free. Since your car is OBD1, it won't be very specific but it might shed some light on what's going on.