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
