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420 SEL 1991 207K miles 420 SEL 1991 207K miles
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Old 12-10-2007, 08:00 PM
1991 420 SEL
  
Join Date: Dec 2007
Location: Everett, WA
Posts: 4
420 SEL 1991 207K miles
I just had my spark plugs changed to NGK Iridiums. The old BOSCH ones were wet and black- running too rich? Where is the adjustment for this?
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