Lack of power is often caused by electrical, or engine wear. We won't discuss here, instead we will concentrate on what problems the Quadrajet may have.

• Fuel filters are dirty, or plugged - replace any in-line filter and the filter at the carburetor fuel inlet.
• Float level may be too low - set to specifications.
• Float isn't dropping far enough to open the needle fully. Make sure the float drops enough to allow the needle to come out of the seat.
• Power valve may be dirty, or sticking. Make sure the power valve moves up and down easily and there is a spring under the valve.
• Float is catching when moving up and down. The float pin may be worn. Move the float up and down by hand to see if you feel anything catching.
• Needle is sticking in the seat. A damaged viton tip can cause this along with some chemicals added to the gas. NOTE: Do not apply any pressure to the needle when adjusting the float.
• Test the fuel pump pressure. If it isn't up to specifications then you won't get enough fuel. Check your motors manual for the specification but 4.5- 5 would be good.