tested coils, all within spec. replaced anyway thought maybee heatsoak and carbon tracing. cleard up for a bit. then back when cold. put dielectric grease in boots. still missfire.new plugs cleared for a bit, still miss fire. lean code. one bad CCV valve. replaced. cleared for a bit. biggest improvement was clean Maf. cleared for a while. then put premium in it. no difference when cold. sprayed allover engine to find vac leak. Nothing. still stumble when cold. when warmed up, no codes. no oil in plug wells. maybe enough in each to soak a Qtip. this thing runs like shit when itis cold. no exhaust smoke.......?!?! any suggestions?

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01Evolve M5 86k silver over black, 02 M5 indi, Dinan, white over caramel 106k. 1991 850i with 66k ttint 72 TA # matching 455HO, with a few tweaks, 06 CCSB 2500 Duramax LBZ with 120 hp efilive tune, 03 CCDRW,LB7 with a 120hp efi live tune 140k. 99 FLHT. 03 FXDWG with 103 in it. 1981 yamaha 850 3cyl. Piped and carbed, cafe in progress. 1997 26' Eliminator eagle, 548 cid BBC built by me. 93mph. Lastly the reason why i am here, 05 x5 4.4. Purchased for pocket change and trailered home.