Quote:
Originally Posted by AJ986S
If not oil smoke, might be unburned fuel. Does it smell like gas? Like its running rich? How's the idle? Is it rough at all? Your plug picture looks like the Bosch Platinums. I recall when I used to use those in my 240Z years ago that gap was pretty critical. Any possibility at idle RPM that plugs aren't sparking consistently, and some unburned fuel is getting pushed out? Might try checking the gap, or even trying another type/style plug as a test.
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Yes they are Bosch Platinum installed by the PO. The idle is not rough per se but it fluctuates between 850 & 900 rpm. I did not check the gap when I had them out but can do that next time I'm in there. My thought was that it's running a little rich at idle?