Dan Francis said: (quoted from post at 10:21:29 05/25/08) I have a DBGVCC 429 4AL on my 63 or 64 Ford 4000. I think the govenor ring is going out. It will surge to high RPM's and the throttle will not respond well at all. Just a slight tap down it will die, slight tap up it will rev up too high. Will a leak in the fuel return line cause this? Does anyone know if a DBGVCC 435 16AP pump will work in place of this one. I do know the plunger size is bigger but what other differences are there. I recently cleaned the fuel tank, changed the filter so I am dealing with good fuel delivery. It's wierd though, one day I can start it up and it runs great just like it should and another time start it up and it wants to run crazy. Will the govenor ring cause that?
Thanks
Dan
Yes, that sounds like a governor ring. There is a bit more to it than just buying the 30 dollar kit as JB suggests. You need to know what you're doing when you start working on one of these. Somewhere in the archives is pretty detailed post I wrote on proceedure. Do a search and you should find it.
The old plastic governor ring has become brittle and disintegrated. Little pieces of it are sporadically clogging your return causing your symptoms. The pump needs to be totally disassembled and cleaned and put back together with new seals and governor ring.
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