I might add that Arthur has been posting here a LONG time, on this site before 2000 when I first came on-line. Over the years, I have floated in and out as I spend more time on other sites but I always come back when I have a "hard" problem. This is by far the best Mercedes technical site. Thanks in part to Arthur, MBDoc, stevebfl and several of the other very knowledgeable folks who spend their time here.

Now to continue the saga. I replaced the plug wires and stubs and installed a new set of Bosch copper plugs. Nothing significant changed.

I did notice one more interesting symptom; the engine will not rev above 4000 RPM (in neutral). The computer starts cutting out either fuel or spark.

My parts guy mentioned that the mass air sensor on these cars is a commonly replaced item. I would think that a bad air sensor would trip a code.

Just to verify; I checked the pin #8 for codes with the ignition on but the engine not running. The check engine light is still not on (but the bulb is good, lights with key on but the engine not running).

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Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"