2003 doesn't move forward at idle under own power

[JBS79]

Purchased a used 4.6L 4x4 with LS diff and 45K miles and noticed that this explorer doesn't move forward at idle under it's own power in Drive when I take my foot off the brake. It does this in reverse but not forward. I need to give it gas before it actually moves forward.
Seems odd, is this normal? This is unlike my previous 1st and 2nd generation explorers.
Everything seems fine...although the ABS light suddenly came on last night.

:exp:

 

[Exproblems]

Purchased a used 4.6L 4x4 with LS diff and 45K miles and noticed that this explorer doesn't move forward at idle under it's own power in Drive when I take my foot off the brake. It does this in reverse but not forward. I need to give it gas before it actually moves forward.
Seems odd, is this normal? This is unlike my previous 1st and 2nd generation explorers.
Everything seems fine...although the ABS light suddenly came on last night.

:exp:

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I haven't heard that one before in here, but you could start by checking that the 'Parking Brake" is not engaged in any way. During a yearly New York State vehicle inspection, they test the Parking Brakes by pressing down on the Parking Brake pedal engaging it, and if it holds the vehicle still while in gear at idle, in forward and reverse, the Parking Brakes pass that part of the vehicle inspection. So the parking brake could keep the vehicle from rolling at idle while in gear. I also had parking brakes work right in one direction and not the other. Maybe someone accidentally set the parking brake, just pull the release handle and see what happens. Just a hunch and easy to check.
You could also have a brake caliper piston starting to freeze up, staying in the stop or brake position. Usually when this happens the brake pads, rotors and rims get very hot from the constant friction of the brake pad compressed against the rotor while you drive down the road. You can "carefully" check this out by hand by feeling around the rims to see if they are exceptionally hot after you have driven it for a distance. You can usually smell burning brake pad material when this happens as well.