Injection pump timing: This is NOT a service that needs to be performed regularly. The Bosch injection pumps can last the life of the engine and never need to be timed / adjusted. The most common cause for the pump to be out of time is due to timing chain stretch, and in that case the proper repair is replacing the timing chain.

If you suspect that a previous mechanic has adjusted the pump timing, then you may want to check it, but I don't think that is causing your current issue.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC