Just for the fun of it; before starting in the Morning start pumping on the Hand Primer until you hear a squishing sound and then pump some more.
If it starts up fast like that you have either an Air leak of the Valves in the Fue Supply/Lift Pump are allowing the Fuel to go back towards the Fuel Tank. It might be refered to as a Pump losing prime.

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84 300D, 82 Volvo 244Gl Diesel