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Thread: Holley High Ram & LS3 MAP PROBLEM!!

  1. #1
    Tuner in Training
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    Sep 2015
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    Holley High Ram & LS3 MAP PROBLEM!!

    did anyone figure this out ive searched and searched....? this is how i had to get it to run, it would do nothing but high idle with factory ls3 cal... really dont wanna run a brick its so clean behind intake...

    dansapidletune.hpt

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
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    Rogers, MN
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    What else is done to this vehicle?

    It says 5.3 but cylinder volume is setup for a 4.8. The MAF is still enabled via the high fail hz but the codes make it seem like you want it disable. The VE is extremely choppy still and needs lots of work.
    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.

  3. #3
    Tuner in Training
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    Sep 2015
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    correct, it was a rough get it to idle type of deal... we tried the factory setting for ls3 map and still had issues high idle..... tapped a brick 3 bar map and bam no high idle... only thing we can think is the calibration of the factory ls3 map cant be done with p01 computer or gen3 that is... this is the tune i used that high idled, i would like to use if u wanna take a look!!

    kenny final tune 807whp.hpt

  4. #4
    Tuner in Training
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    Sep 2015
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    No one has any info on ls3 map sensor?