Can anyone point me at the Intake manifold Gasket. Based on some of the info posted here, I think that this is my problem. Engine shutdown at stops, idles really low, then cuts out. I need to drop it into neutral and rev to keep it going. Any help apprieciated. Thanks.

Locate the large aluminum chamber on top of the engine (you may need to lift off the black plastic decorative cover off first). Follow down the left & right sides of the intake chamber, to where it mates up to the inside of each cylinder bank (left & right sides). You will see 3 runners mating up to each side, with a black plastic gasket material protruding out slightly between the intake & cylinder head surfaces. That's the IMG. It's a hard phenolic resin/plastic gasket that is prone to breakage. You can spray around with a fine water mist, or carburetor cleaner to pin-point where the leak is. G/luck
Joel

Im having the exact same problem with my Rodeo. I could hear a hissing noise from under the engine cover and now its in getting fixed. Also have to replace the o2 sensor and possibly a couple other things.