Be careful when removing the power piston. The stem can break off easily and these are not longer being produced. Push down on the stem and spring with your finger, then let it snap back. Do this over and over until the piston comes out. A frozen stem is another problem all together. Try spraying silicon spray lubricant into the vent hole.
The Rochester 2 Jet power circuit includes the power piston assembly. At idle the piston is pulled up (vacuum) off of the power valve making the power valve close. As rpm is picked up vacuum drops and the piston starts to drop. Eventually it pushes the power valve open allowing extra gas to enter the system.
Be careful when removing the power piston. The stem can break off easily. Push down on the stem and spring with your finger, then let it snap back. Do this over and over until the piston comes out. A frozen stem is another problem all together. Try spraying silicon spray lubricant into the vent hole.
