I've got a '91 HO, 4.0L. Starting just yesterday, it'll crank and crank and crank and not start. However, it will start if you hold the gas to the floor and keep cranking. When doind that, it'll start a little rough then seem to run just fine. I was hoping for something dumb like the fuel filter, but after changing that and the spark plugs it's still doing it. Any ideas from the greats? Thanks dudes!