Mercedes-Benz Forum banner

1980m 450 SL High Idle and Rough

1K views 4 replies 2 participants last post by  jolo 
#1 · (Edited)
All Vacuum Lines are connected. I understand from previous threads I could have a faulty Warm Up Regulator, or Idle Mixture Valve or Idle Air Control Valve (the blue electrical connector on top). Can I service/clean any of these parts as replacements are costly? Can these parts be tested before replaced? I will be replacing the exhaust and the O2 Sensor, but I don't think the problem lies there.
 
#2 ·
Your Idle Control valve is not electrical. It is an AAV (Auxiliary Air Valve) that operates mechanically. It could be the high idle problem. Do a search for AAV or look in the EGv107 section on CIS.

The blue electrical connector is the cold start valve.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top