If you look at my signature, you know I have a lot of diesels.

My 91 300D 2.5 has the system where it will not get boost without the EGR working… unless you have a pressure actuated wastegate I guess….

Is the 3.5L 603 the same setup? Either the 3.5L in the w126 or the w140?

I’m trying to get my newest 126 going and will be cleaning out the intake. I’d like to disable the EGR for off-road testing purposes, but am not sure if I’ll be able to load the engine and achieve boost then.

Is the 603 in the w126/140 like the 602, or like the older diesels where egr vacuum is all that needs to be pulled?

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)