I've got something similar.
Recently replaced the spark plugs on my Maxima 03. The first three- beautiful; fourth- dripping w/ oil(dark) & I had just changed oil/filter.
That fourth spark plug coil didn't "pop" on of off like the others so I hoped it was not a leaking valve/seal but just not firing.
No smoke, no engine light, idle a little rough, but I've got 75,000 miles on it. (Has never stalled).
Also have to mention- terrible gas milage (15-17per gal)
After calling around for parts & buying a OBD 2 (Scanner for $200+- useless unless you fork over another 200+ online for program installs.)
I've scheduled an appt w/ AAA Care Car for Wed morn. - I'll let you know what they find.
Monday, March 6th, 2006 AT 6:42 PM