2001 was the first year for the 4.0l SOHC engine in a Ranger, Explorers got this engine a few years earlier.
These early engines('98-'04) had bad timing chain parts, the engine must be removed to change the parts, but they are fine after new parts are installed.
That's the rattle referred to above.
140k could be nearing end of clutch life.
It has an self adjusting pressure plate so you can't tell from pedal disengage/engage position.
It will have a Ford PATS(passive anti-theft system), this system deals only with the engine running, it isn't part of alarm or keyless entry.
In the plastic end of the key there is an RFID tag, it requires no battery, in the ignition key slot there is an RFID tag reader.
Each RFID key has a unique tag number.
When vehicle was originally sold it would come with 3 keys, maybe 4.
Those 3 unique tag numbers were programmed into the computer that runs the engine.
The computer will not allow engine to start, without "reading" one of those tag numbers.
So losing your keys is a BIG DEAL.
Make sure you get at least 2 working RFID keys, test both of them to make sure both will start the engine.
If you only get 2 then I would get a 3rd made by a locksmith, and then with 2 working keys you can add a 3rd key to the computers memory yourself.
You can't with 1 key, have to have 2.
With 3 keys you can lose 1 and still add another.
If it only comes with 1 working key then I would call a few locksmiths and find one that has the computer software that can add Ford PATS keys to the computer manually, and then ask them the cost for 2 new PATS keys, cut and added, then negotiate that cost off the price of the vehicle, or part of it at least, lol.
Last edited by RonD; 01-25-2015 at 11:19 AM.