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  1. 7.3L Power Stroke - Aftermarket & Performance
    Got an 03 excursion with the 7.3. runs solid enough except on occasion (usually after sitting for several hours or more) I'll get a loud whistling/screaming sound after start up. And once I let it warm up and try to move it's like It has no go. Can't get past about 15-20mph then suddenly it...
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