I have a Autolite 4 bbl. carb. C5ZF-C. OE on my A code 289 motor. Started having re-start problems and determined the cause was a flooded condition caused by a leaking power valve. Got a generic valve from NAPA part # 2-4005 installed it and this one leaked as well. When I remove the power valve housing lower cap it is full of fuel. Just bad luck or is something else going on ? Thanks in advance. Brian
Let me ask the obvious; a gasket was used on the PV before screwing it into the base of the carb - yes? Other than the possibility of the new valve being faulty, I know of no other reason you would have fuel in the cap.
Charlie, CMSGT USAF Ret. 65 Hi-Po F/B, 67 GTA F/B (SB) Mustang Owners Club of Austin (MOCA) TX, Member MCA #27479. Now working a '69 M code mach 1.
Got a Holley 6.5 power valve and installed it. Thanks for the tip. Seem to have developed another problem. The secondaries won't open. With the motor running and at about 1/2 throttle the secondary arm will not move forward and I cannot move it manually. With the motor off and at about 1/2 throttle I can move the secondary arm forward and the plates open as well. Thanks, Brian
Sounds like you have have a split diaphragm there too. IIRC, there is also a locking pin and lever connected to the choke mechanism that prevents the secondaries from opening unless the choke is fully open.
Thanks for the reply. The secondary plastic arm, rod and pivot @ the fast idle adj. are all in place. This is the assembly that won't move when the motor is running and can be moved when not running. Secondary diaphram ? Brian
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