4. Remove the air hat from the throttle body.
a) There are two 10mm bolts that need to be removed, one on the right side of the engine
(your left as you face it) pointed horizontally across the engine, and another 10mm bolt
on the left side of the engine going vertically down. Both bolts go into brackets on the
intake manifold.
b) There is also a hose clamp that clamps the air hat to the throttle body. It has an 8mm
bolt on it. Loosen the hose clamp, and the air hat will slide off the throttle body. You may
have to twist slightly since there is a rubber gasket on the mouth of the air hat.
5. Disconnect the throttle linkage. There are apparently at least two variants.
a) The FSM shows one with an egg-shaped cable end going into the side of a bell crank.
To remove this one open the throttle by hand and slide the connector off of the FRONT of
the bellcrank stem. DO NOT try to pry it off sideways or you may break the bellcrank.
b) My Durango has a cable that runs over the top of the bellcrank, and the cable has a
barrel-shaped end. To remove this one open the throttle by hand, and rotate the cable
toward the front of the engine. There is a slot in the bellcrank and when the slot is
aligned with the cable it can be slid out the side of the bellcrank.
4. Disconnect the cruise control cable. Open the throttle by hand, and slide the end of the cable
forward to disengage it from the bellcrank. DO NOT try to pry it off sideways or you may
break the bellcrank.
5. Disconnect the vacuum line to the PCV valve. This line is on the left side of the throttle body
(the right side as you face the engine), and is the only vacuum line on the throttle body. It will
twist off.
6. Disconnect the electrical connectors for the IAC (Idle Air Control) motor and the TPS (Throttle
Position Sensor). Both of them have a tab on top that must be depressed to disconnect the
connector. The MAP (Manifold Air Pressure) for the 4.7L engine is not on the throttle body, it
is on the intake manifold so there are only two sensors.
7. Remove three 8mm bolts connecting the throttle body to the intake manifold.
8. Remove the throttle body from the intake manifold. Do not lose or damage the large "O-ring"
between the throttle body and intake manifold (I use "O-ring" because that's what it says in
the FSM, but in actuality it's an odd-shaped generally rectangular seal.)
9. Cover the intake manifold opening with a shop rag to prevent anything from falling into it.
Don't stuff the rag down into the intake manifold, just drape it over the opening. That way you
can't forget to remove it when you replace the throttle body.
DISASSEMBLY AND CLEANING
1. There are two sensors on the throttle body. The TPS (Throttle Position Sensor) is toward the
front, and up toward the top of the throttle body. It does not need to be removed to clean the
throttle body assembly. If you do remove it take careful note of where the shaft of the throttle
blade fits into the TPS and be sure to reinstall it the same way.
2. The IAC motor is at the rear bottom of the throttle body and is held on with two T-25 Torx
screws.
a) Take note of which side of the electrical connector for the IAC motor is on top so you can
reinstall it the same way.
b) Remove the IAC motor from the throttle body. The IAC motor has a long plunger that
goes down into a passage in the throttle body. This passage, and the shaft itself, tend to
accumulate a lot of combustion residue and as such the IAC motor may seem to be
stuck. (mine was so gummed up it made a sucking sound when I pulled it out!) If the IAC
