I have a ford 6600 early model model with cav injection pump. Tractor was running fine till hay season came. First it started off slow when I would work it for a few hours it would stop reving all the way up and start puffing white smoke and it has progressively gotten worse to the point that now when u start it up cold it runs fine but as soon as u start working it won"t rev and puffs white smoke but if I loosen the bleeder valve on the side of the pump and let fuel run out it revs back up and runs fine until I close the valve then dies back down. Injectors have been changed fuel has been drained and tank cleaned filters have been changed. Just wondering if anyone can help me out cause local Machanic has no clue.
- Thread starter BobbyM5
- Start date
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Check valve in fuel return fitting that screws into inj pump is clogged. Clean it out and it will run better. I'm not sure if the CAV has a drive ring that can deteriorate similar to a Roosa-master or not.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Check valve in fuel return fitting that screws into inj pump is clogged. Clean it out and it will run better. I'm not sure if the CAV has a drive ring that can deteriorate similar to a Roosa-master or not.
Dieseltech
Well-known Member
- Location
- Akron, Indiana
CAV DPA pumps have no retainer ring to fail. You can still have a return side restriction in the system though causing your trouble.
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