SL/R107: IDLE TO FAST
Thread Starter
Newbie
Joined: Feb 2016
Posts: 1
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1986 560 SL
IDLE TO FAST
My 1986 560 sl was idling at aprox 1250 RPM's.. was told by a MB mechanic that the fuel pressure regulator need to be replaced...because it was leaking fuel and that would solve the idle issue...I replaced the FP Regulator and now the the 560 is idling at aprox at 1500 RPM's..the benz runs great except for the idle issue....starts without any hesitation.. runs down the road as it was made to do....
What now?
Thank you in advance
Mick
Anna Maria Island Fl....
Come on down, lets go fishing
What now?
Thank you in advance
Mick
Anna Maria Island Fl....
Come on down, lets go fishing
Newbie
Joined: Oct 2016
Posts: 4
Likes: 0
1986 560SL, 1995 E320, 2005 E320, 1987 Ford Lariat F150
Had the same problem with my 86 560sl. I also cleaned the ICV and also took the time to lube all the throttle linkages. Idles perfectly now at about half your idle speed.
Senior Member
Joined: Jan 2010
Posts: 330
Likes: 26
From: Middle of Nowhere, USA
450SL
There is the idle control valve. Cleaning may help. There is also an idle control relay/unit that might be the problem. Since the pressure regulator made a difference it needed replacing.
Sometimes the OVP (over voltage protection) relay can contribute but most of the time there are other symptoms if it or the fuse on it fails.
Sometimes the OVP (over voltage protection) relay can contribute but most of the time there are other symptoms if it or the fuse on it fails.
