The thought of it being the pump has crossed my mind, but I doubt that's it since it is idling correctly.

When I have the hood up, I hear a loud sucking air sound coming from the carb area, so I'm thinking maybe a cracked vacuum line.

If that doesn't work, I'll do the cap & rotor. Then on to ignition coil. Will update when I make progress. Someone with ideas and/or experience feel free to point me in the right direction please.