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I adjusted the fuel injection pump. Was pretty straight forward like you stated, except for the bolt on the bottom right (when looking down at the engine from the front) is a really pain to get to and actually turn. Tried every type of a wrench and socket I had, just not much room to move the wrench and sockets didn't have room to actually go on. In any case, will report back once I get the dash put back together and actually drive the truck. The timing marks were aligned directly up instead of being advanced a bit.I think most people on here believe the easiest way is adjust and test drive until you get the best performance under all load conditions while road testing. Facing the engine from the front looking down on the injection pump move the mark on the pump to the right of the blocks witness mark to advance the timing. Generally on a well performing pump and engine lining up the witness marks will put you in the right place The thickness of one witness line on the pump to the right of the block line will be all that is necessary in some instances . Trial and err.
I figured out that this was my doing. I forgot that I replaced that pump about 3 years ago with a reman from the manufacture... whose name escapes me at the moment but its on the pump ID plate. Wasn't cheap I remember... but it fixed the problems I was having at the time. I had a tbi shortly after that in an incident with a fork lift with an "operator" who should have never been driving it.... lifting a large steel beam, and them catching the beam under a steel shelf and putting it under a lot of pressure/weight.... and then to top it off I broke my leg pretty severely about 6 months later. I was only cleared to drive again back around this past august, which is why the truck has mostly been sitting since then until the past few months. During that time my Dad would drive it up the road a bit once in awhile just to keep everything lubed and etc. Anyway, guess thats why I forgot about replacing that pump.