On the W123 turbo IPs, the stop lever doesn't move when vac is applied to the servo. This makes is a bit difficult to tell if you have it right, but if the levers are connected, it will work.

Larry ran in to trouble when he changed the IP, not putting a shutoff on it. Appears the IP itself was defective.

Cracking the injector lines or a CO2 extinguisher down the intake (sans air cleaner!) will always work. There is enough fuel in the IP, certainly in the filter assembly, to blow the engine up.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!