I have a 2007 mustang 4.0L. it was running great then one day I parked it overnight and it wouldn't start at all. Cranks until the battery dies. It has a very slow crank when I first turn the key and only cranks fast when I floor the gas pedal (engine flood mode).

I have luck starting it by flooring the gas with it connected to a jumping vehicle. Then cranking the car with the gas floored until it spins VERY fast, then I let off the gas and it starts up very quick. Once it's running its...

07 4.0 rough start long crank HELP