I am working on my head and had a friend hold the chain tight while I rotated the motor over to see if one of my pistons had a slap. Well, the injection pump timing gear stopped turning and then rolled back really fast like it was spring loaded. How do I time it to the motor again? I know I have to the first piston to tdc and use a dial indicator to time the head. But what about the injection pump? Anyone have a problem like this before?

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800