Re: starting problems
My 2002 always started immediately too until I just recently fixed a vacuum leak, changed the fuel filter, and ran a bottle of Gumout injector cleaner through the tank. All done in reverse order listed and I'm fairly convinced one of them introduced the starting issue. Just not sure which one.
I'm thinking a good place to start would be to have the fuel pressure tested after it has sat for a while. I don't have the pressure numbers you should see, but those should readily be available, as well as when you should see them. The "key on for a bit" before cranking works for a few of us, so that seems to point to a leak down of pressure. Have you noticed a difference when hot or cold?
Isn't the 2001 fuel injected? If so I don't think pumping the pedal is doing anything for you.
2002 4x4 4.0L