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  1. 94-98 7.3L Problem Forum
    94-97 PSD Vacuum Pump Replacement Instructions I recently bought my first Powerstroke, a 97 F250 4x4, and some problems came up that I was not sure how to fix. This is for the vacuum pump.. I was driving down the road on my way to school and the brakes went out when I was going down a hill...
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