It's an 85 300SD (per my sig line, which I guess got cut off somewhere - sorry for not mentioning that info in the text.)
I will check by blowing through the line per your suggestion. Thanks! Chris Marshall Booth <[EMAIL PROTECTED]> wrote: Christopher McCann wrote: > OK, I replaced the vacuum line from the back of the intake manifold to the > switch over valve. The old line was not clogged at all (but I have a nice new > one now) and the problem of slow acceleration persists at low altitudes. No > way to test the high altitude issues as I am no longer in Colorado. Ånyway, > it is as if nothing changed. Could the switchover valve be > clogged/stuck/broken? The line from the switchover to the ALDA is not > clogged. > > I hesitate to even suggest - could the ALDA be out of adjustment? The pressure line from the ALDA, thru the switchover valve, to the intake manifold MUST be open and free of obstruction. Blow (from the ALDA end toward the manifold - there should be no more resistance to air flow than would be expected from a large drinking straw. YES, the ALDA could be out of adjustment. Perhaps 80+% of the '83-'85 turbodiesels were set very "lean" at the factory to be sure that the cars met ALL the emissions requirements. Set that lean, many did NOT meet the Mercedes published acceleration figures. The ALDA should be set so that the car meets the 0-62 mph acceleration numbers published by Mercedes. I'd give you the actual number if you provide the year and model car you are discussing (and whether it is California certified). It's more than just desirable to provide that information IN EVERY post referring to that car. Marshall -- Marshall Booth Ph.D. Ass't Prof. (ret.) Univ of Pittsburgh School of Medicine [EMAIL PROTECTED] _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com Christopher McCann, Squier Park, Kansas City, Missouri "Anke" - German Shepherd who loves Kongs! "Sammy" - German Shepherd who loves to fetch logs! "Nanook" - Siberian Husky who loves air conditioning! ---------- -1985 300SD, 227K miles, "Wulf" -1982 300Dt, 118K miles, "little blue klatter box" --------------------------------- Don't let your dream ride pass you by. Make it a reality with Yahoo! Autos. _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
