unplug either injector number 1 or 7 it runs fine?

1995 FORD E-SERIES VAN
220,000 MILES
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JACOBWIEBE
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I have a 1995 ford e350 cube van with a 7.3 powerstroke and when i unplug either injector number 1 or 7 it runs fine but when i plug them back in it misfires on the opposite side what could be causing this?
Sep 12, 2012 at 5:29 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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