Howdy:
I have an 86 2wd, 5-speed Pickup with a 22r. I am replacing the AAP (auxiliary acceleration pump)diaphram. The new Toyota diaphram that I bought is merely the rubber diaphram with a round metal insert in its center. The diaphram that I removed from my truck has a 3-inch rod attached to the center of the diaphram which enters a bore in the choke housing. I was certainly surprised to see this rod attached to the diaphram because my Toyota shop manual shows no such rod and the Toyota replacement diaphram that I bought has no rod attached to it. I used the my VIN to buy the part so I am fairly certain that I don't have the wrong part number.
The part I removed from the carb looks exactly like what is called a "choke pull-off" in the Schucks catalog. Is a "choke pull-off" just another name for an AAP? Here's a link to a picture:
Any help is appreciated.
Mike