Question about 1986 Ford F 350

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I have a stanadyne injection pump on a 1986 ford 6.9 liter diesel ,the pump was bought as rebuilt but is way overfueling the engine,a friend and former diesel tech told me the bypass ''button'' may be stuck.how might i unstick the button or check for any other possible ''common'' issues that may cause a ''good'' pump to overfuel??

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I would take it to a good injection pump shop. Injection pumps are pretty finiky to work on. They require some special test equipment also. Just my 2 cents. Good luck.

Posted on Sep 26, 2009

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