Date registered: May 2004
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RE: 88 560 sec rough idle
For a "rough" idle, you may want to have your mechanic check the lambda on/off ratio.
It may never have been adjusted, and my experience is that *generally* the system
tends to go toward the "lean" side over the years (e.g, high control voltage), which will
cause a rough idle. Make sure any other needed maintenance is handled before tho,
especially your fuel filter. (A dirty/plugged fuel filter will affect the on/off reading.)
Vacuum leaks around the injectors will also cause rough idling.
Beautiful car, BTW...the 560 coupes are awesome vehicles...and in good condition, I
have a feeling they will be worth a LOT of money in the next 5-10 years.