Date registered: Apr 2005
Vehicle: 1974 450 SL
Location: Coos Bay Oregon
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RE: Infrequent Idle Problem
I only run about 15 minutes to work, so I suppose water may be gathering in the can. If it continues, I may drill a hold in the back bottom corner to try to drain it then seal it back up... It is far from a new muffler! Since I was messing with the cluster, I wonder if just reseating the wires on the back there will clear the tach jumps? Since I use the car so little (in terms of time) I don't suspect the ground strap, but i'll crank it down just the same. The clock has been dead for a while, too. Could this be a related problem? I pulled the tach/clock unit out of the cluster housing to clean it and see if it was a power problem, but it seemed to be getting 12v... Hummmm. The cooling system was completely reworked last summer by a certified mercmach, including a new radiator and hoses.
About that rough idle, I have been trying slightly different positions on the FI computer knob, and it seems to make no real diff. Even at idle when it is not warm yet, it doesn't seem to make much diff.
On the bright side! it has been running great, morning and afternoon!! Almost no roughness at all. Although, I suppose when I start her today, I may be in for a big surprise...[:o]
Thanx for all the advice. I am really good with mechanical stuff, but this german engineering is a new thought process!