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#1
03-24-2018, 09:08 AM
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Motors turns to fast ; how to slow it ?
Hi,
My old 1986 560sl car didn’t turned realy from few years. I have to verify a lot of things. First i filled it with 98 gasoline, but now my motor turns at 1800 rpm mini! Where is it coming from ? Automatic choke? Fresher temp? How to slow it ? I made 2 miles and the water thank was full ! Do you think it comes from motor speed ? Or old radiator? Tk 
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#2
03-24-2018, 09:56 AM
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I'm assuming the problem is that the idle speed is too high at approximately 1800 rpm. A common fault causing this condition is a failed OVP relay. If the lighted dashboard symbol for the ABS system does not go out shortly after starting the engine this is a fairly good indication that the OVP relay has failed. Search OVP for more information on replacement.
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#3
03-24-2018, 11:06 AM
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Another common fault is a failed control module for the idle air solenoid (solder cracks on the PCB inside it). With the new idle speed being 1500-2000 RPM, it can be a wild ride in traffic...
__________________
Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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#5
03-25-2018, 07:02 AM
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OVP relay is above the fuses behind the small panel in side of the passenger side footwell.
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