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You've checked the return springs and 'freeness' of cable operation? Nothing behind the gas pedal? Choke plates are released? Check your mechanical things before you go after the electronics.

yup on the first part, and multiply that yup by a billion on the second.
disconnect your throttle cable and give a liberal schlacking of wd or your lube of choice and see if it frees it up. while your at it, hit the actuater as well.
ps, welcome to the wire.

98' BBJ Grand Laredo 5.2 locked and loaded,.01' Gen III XLS. Frankenmonty lives on in another.