Date registered: Oct 2009
Vehicle: 1984 380 SL
Location: Near Dallas, Tx
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When we replaced the rockers (all of em) on the passenger side, the mechanic noted that the oiler looked "new" and had likely been replaced. In any case, it was clean and functioning properly.
I don't think there is a vaccum leak, either, but I'll try to follow all the hoses and lines and look for a crack or break. I have not found one yet.
From reading threads on the internet (this forum and elsewhere) I tend to think the problem is the idle speed relay, or something in that circuit. I have noticed that the temp guage "jumps" at times (not consistently or frequently, just on occasion) and I am led to believe that the water temp. sensor plays a role in the idle speed relay circuit. However, disconnecting it doesn't seem to make any difference in the "surge" idle. It lopes at idle, but the slightest pressure on the accelerator smooths it out. It's like I need a good old fashioned "idle speed adjustment screw" to turn a few threads!