If you are using the method where you pressurize they fuel system with the hand primer it is best to get someone else to keep pumping on the hand primer so that an even pressure can be maintained. If you try to pump yourself and at the same time watch and adjust things the pressure ends up dropping. If the pressure fluctuates the amount of drips per second coming out of the same sized hole will also fluctuate.

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84 300D, 82 Volvo 244Gl Diesel