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Old 07-23-2000, 05:47 PM
stevebfl stevebfl is offline
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Well for all you young guys I'll straighten out some inaccuracies and maybe give some insight as to why fixing this "check valve" made such a difference.

First, no EGR for years from the date of this guy. Second, sorry Larry, that diesel does have a throttle and a pneumatic governor; which gives the reason why a manifold leak affects running on that guy and not later models (77 on - no more throttles).

I presume the check valve was the one in the line to the power booster. A hole there would alter the manifold vacuum that works on a diaphram in the back of the injection pump. This directly moves the pump rack.
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