Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: lowpad on April 24, 2020, 02:48:21

Title: Idle Speed Change
Post by: lowpad on April 24, 2020, 02:48:21

The idle speed of my normally reliable 230SL recently jumped from the usual 800 or so up to 1,300 - 1,500 (when warm).  I've also noticed that it's now slower to return to idle than normal, almost as if a spring wasn't strong enough.  Before I dive into the linkage tour (much appreciated, by the way), do these two symptoms ring any bells?  The car has an electronic ignition, so not sure is something is up there unless the timing somehow slipped.  Haven't done anything else other than usual maintenance.  Appreciate any suggestions if this is something obvious.

Title: Re: Idle Speed Change
Post by: mrfatboy on April 24, 2020, 03:23:44

Years ago I had something similar happen. It turned out to be the broken vacuum tube from throttle body to distributor.

Title: Re: Idle Speed Change
Post by: ja17 on April 24, 2020, 03:27:06

Yes, I also was thinking vacuum leak.