CAV Fuel Injection Pump Idles but doesn't accelerate

rograham1

New User
Tractor (1978 Ford 555 TLB) would idle but not accelerate. Confirmed not fuel by routing hand held chemical sprayer wand directly into line from filter feeding pump. All injectors bled and cracking each one deteriorated the idle. Solved by disconnecting throttle rod and then rapidly moving throttle arm on top of injector pump. Eventually this freed up the metering pin and acceleration was restored. Keep in mind that the linkage from throttle arm to metering pin is all spring loaded. Could probably have opened the governor cover and manually moved the metering pin arm.
 

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