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I had a stuck throttle on my 1996 Passport. The throttle cable had a piece of protective black rubber around the throttle cable between the outer cable covering and where the cable connects to the throttle body. The rubber had began to come apart and some of it was getting inside the throttle cable covering, causing the throttle cable to bind. I removed the rubber piece and cleaned out the cable by covering it with GOOF-OFF and then sliding the cable in and out until my cleaning rag was clean when I wiped off the cable. I did not replace the rubber piece and have had no problems since.
The rubber part is called an isolater.
If you look in the engine compartment , from the drivers side , it is on the side of the throttle body ( where the big rubber engine air intake tube connects to the throttle body and it's right above the air conditioning compressor )
The rubber hose that connects from the chasis to rear axle is for grip.
The engine air filter is in the engine compartment , at the front , on the passenger side ( then you will see the mass airflow sensor , the big rubber engine air intake tube that connects to the throttle body )
On the undercarriage on the driverside. From the front of the gas tank, follow the thicker rubber tubing toward the front of the car, a rubber elbow will run into the canister (approximately the size of a half gallon jug of milk).
Crawl under the truck under the driver's side door and the canister is a black plastic box with some rubber hoses running from it.
sounds like the plastic tube from rubber tubing (between filter and tb )and that plactic tube connects into back valve cover
If the "air bellow" refers to the rubber tubing that connects to the throttle-body and air filter housing...There really isn't a torque spec - just tightly snug-it up (20 inch lbs or so ;))
There is a rubber elbow on both ends of the metal pipe that connects to your PCV valve.
The rubber that comes from oil is called 'synthetic rubber'. The rubber that comes from trees is called 'natural rubber'.
The big rubber engine air intake tube will go from the engine air filter to the engine throttle body