My 84 GT Coupe was parked for 12 years. I have started it up, but it only runs for a few minutes and slowly seems to run out of fuel and stops. The electric pump seems to be running fine, and there is fuel coming to the distributor pump while it is stalling. The car usually will immediately easily start up again with the starter. Sometimes it will run good for up to five minutes. There is no black smoke, so I don't think it is overfueling. Anyone run into this?