what type of pressure gauge tool do i need for the test stated above? andwere to obtain? i have a mity vac w/ gauge.

the posted fsm sheets above are in the engine combustion section 07.1 1120.

thanks everybody for the excellent advice for this complicated troubleshooting!

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

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