Thanks for everyone's replies. The injectors were replaced about a year ago along with the seals, so I don't think that is the problem. The cylinders that appeared to be running lean were the first and last on each bank. I'm starting to believe that I better leave well enough alone, and wait for some other REAL problem to surface!

Max

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M. Sandler

1986 560SEC: 150,000 miles, runs great, but I've got to sell it (too many cars for one man)
1987 560SL: 122,000 miles, used to run poorly, now (thanks to forum), runs great!
1997 GMC Jimmy: Turned out to be a turkey.
1989 T-Bird Super Coupe: 150,000 miles, still runs great. Ford got it right.