helping a friend with his auto 230sl ?. ho do I raise the idle in drive?

[erickmarciano]

the car idles were well in park but once put in drive it wants to stall.My car is a 4sp so I am not familiar with the automatic ones.
Thnaks
Erick

[J. Huber]

Hey Erick. This is almost the reverse of a recent thread we just had about too high an idle. Same answer though I think...be sure the linkage is set right, and be certain the Constant Speed Solenoid is adjusted correctly. The "plunger" stop can be screwed in or out so it hits the linkage and holds the idle.

[Cees Klumper]

It does sound like the Constant Speed Solenoid is the item to focus on here. It could just be out of adjustment but it could also be a wiring problem or other, more serious, malfunction. I replaced mine last year because it did not have enough power anymore. They are relatively expensive (around 500 EUR I believe mine cost) to replace.

[erickmarciano]

adjusted it and it now works perfectly
Thnaks

[J. Huber]

It does sound like the Constant Speed Solenoid is the item to focus on here. It could just be out of adjustment but it could also be a wiring problem or other, more serious, malfunction. I replaced mine last year because it did not have enough power anymore. They are relatively expensive (around 500 EUR I believe mine cost) to replace.

Cees, how did you determine yours "did not have enough power?" Mine seems to be laboring. The moment I shift into 4 -- the idle drop precariously low for about 2 seconds (seems like an eternity) --before the CSS plunger finally gets extended. Should it be "quicker?" Is there a way to test its strength? I also notice the little rubber seal is coming apart. There seems to be an "outer ring" and then a smaller seal on the shaft. This one is basically floating. Thanks...