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Thread: Why does my car so VERY lean for no reason over 2k randomly...

  1. #1
    Advanced Tuner
    Join Date
    May 2009
    Posts
    479

    Why does my car so VERY lean for no reason over 2k randomly...

    Can't figure out why its doing this. Randomly at part throttle in the 2-3k area the car bucks bad and sometimes even sounds like its coasting(afr goes to 20) can someone explain why is doing this? Heres the tune and log.
    2018 Infiniti Q60s


    2004 350z/LS2: ERL 434ci, 11.8:1,TFS245cc,262/266@113+3,Fast102,NX 102 plate,60#injectors/return w/twin 255s
    Old setup: CNC'd317s, Fast 102, 228/228@114, PT88,83#injectors/full return system. 10.84@138

  2. #2
    Advanced Tuner
    Join Date
    May 2009
    Posts
    479
    Anyone?
    2018 Infiniti Q60s


    2004 350z/LS2: ERL 434ci, 11.8:1,TFS245cc,262/266@113+3,Fast102,NX 102 plate,60#injectors/return w/twin 255s
    Old setup: CNC'd317s, Fast 102, 228/228@114, PT88,83#injectors/full return system. 10.84@138

  3. #3
    take a look at your VE table, in the area 2400-3200 RPM, 94-105 kPa if has a big spike.

    it could be triggering some fail mode since you also have P0101, P0106, 121 tests active. Engine Diag.
    I count sheep in hex...