chugging/ bucking/ surging down hills.
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chugging/ bucking/ surging down hills.
83 ford 6.9. 462k rebuild at 420k at joplin missouri machine shop in 85. Bought from 2nd owner. Sat 12 years pre me. good oil pressure. no blow by. put two k on it. Surges chugs down hills. runs fine up hills and up to 40. doesn't chug at speeds above 60. Starts right up. new lift pump. Have installed clear lines and eliminated supply lines sucking air. purchased new injectors from pensacola diesel. ordered "A" they sent me "BB". figured they would work. chugged the same pre new injectors. runs a little smoother on take off. Installed clear lines behind return caps and to caps. Air is present after the injector return hats. no leaks at injectors. have installed new lines between hats and clamps. New injectors came with new orings. Installed hats gently with petroleum jelly. Is it possible the injection pump is pushing air? Or a weak pump with not enough pressure? I know there is a seal kit available for the pump. should I bother? If a new pump is needed does anyone know of a good/cheap place to get one?
Any advice will be appreciated.
Thanks.
Any advice will be appreciated.
Thanks.
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