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Thread: Lean warm restart?(big cam)

  1. #1
    Tuner in Training
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    Dec 2016
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    Lean warm restart?(big cam)

    Any one have this trouble with a big cam?
    seems adding after start enrichment will not help?

  2. #2
    Tuner in Training
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    Dec 2016
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    Command afr is asking for a rich start.
    my driver side 02 sensor is reading around 100mv lower then the passenger,The wide band is on driver side as well

  3. #3
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Tune and logs for if you want people to look and see what may need adjustment.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  4. #4
    Tuner in Training
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    Dec 2016
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    Tune attached. i will get a data log.
    02 z06 with btr stage 4 cam.
    Tune was from a car with same set up. I have been adding some timing to work on drive ability . Other then the usual bucking and a large dip in rpm when when car is in neutral coming to a stop its pretty good. (has 10 lb flywheel and aluminum fluidamper)


    kirkmay31.hpt

  5. #5

  6. #6
    Advanced Tuner
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    Nov 2015
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    In a sandpit
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    Those o2s aren't doing a thing at idle. Probably not faulty, just not setup enough. Presumably they switch during cruise... (I hope)?
    99 TA, Texas Speed LS376, PRC heads, 233/239 cam, Fast 92mm, 95mm TB, card style MAF, Tick TR6060, Strange 4.11 12 bolt axle & clutchpack diff, Strano springs/dampers, Vette 18" wheels, Vette disks, CTS-V calipers, 16lb flywheel, long tube headers, no cats.

  7. #7
    Tuner in Training
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    Dec 2016
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    its fine at cruise. it has texas speed long tubes . they have the longest primars on c5 headers.

  8. #8
    Tuner in Training
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    Dec 2016
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    i just pulled some 02/rich/lean vs air flow from another tune and im gona try it.

    any one have any input on tuning the o2 sensors?