Sounds like the dreaded ACC servo. If it is the servo, you don't have a monovalve. There are solid state replacements for $$$ but even a standard replacement servo is $$.
Sorry, I missed the picture. It is definitely the dreaded ACC servo. You can search on the topic here and get a lot of info. Performance Products carries the new replacement.
Same servo was used in Chrysler Imperials.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Last edited by kerry; 09-10-2006 at 02:01 PM.
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