Results 1 to 9 of 9

Thread: Spark problem gm 6.0

  1. #1
    Potential Tuner
    Join Date
    Aug 2016
    Posts
    6

    Spark problem gm 6.0

    I am new too this, so i need some help with the tuning,
    I bought a ecm with harness from psi for a 72 chevelle.
    My problem is, when i hit the throttle hard it retard the spark down to 6-8 degrees. See the datalog.
    The knock, MAF, MAP and O2 sensors are new!
    Hope too get some help.

    Regards
    Christian Nybo

    Denmark

    72 CHEVELLE 6.0 4L80E nr3.hpl

  2. #2
    Tuner
    Join Date
    Oct 2011
    Location
    Australia
    Posts
    175
    Can you post your tune please mate.

  3. #3
    Potential Tuner
    Join Date
    Aug 2016
    Posts
    6

    Tune

    Quote Originally Posted by Codes View Post
    Can you post your tune please mate.
    can?t you see it, its in the end of my post, I try to add it here :-)
    Attached Files Attached Files

  4. #4
    Tuner
    Join Date
    Oct 2011
    Location
    Australia
    Posts
    175
    Thats the log, can you post your tune file.

  5. #5
    Potential Tuner
    Join Date
    Aug 2016
    Posts
    6
    sorry for that.... her it is...

    henrik 72 chevelle 6.0 4l80e.hpt

  6. #6
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    Looks to be pretty much all stock. I never understood why GM setup some of the tables the way they do.


    Make sure you are in Edit > view > advanced to see every table.

    Under Power enrich set your HOT/COLD throttle pedal enable to 70%, set the MAP KPA enable to 75-80 KPA.

    Then lower the RPM delay to 2,000 and set the delay from 60.0 seconds to 0 seconds. Set the enrichment ramp in rate to 2.0.

    This will allow it to enter performance enrihcment way faster and make it feel less like a slug. Also if I am reading the chart right under the spark table, the AFR correction chart will add anywhere from 4-7 degree's of timing to the final commanded timing number in the high octane table of around 7-10 depending on rpm/cylinder airmass.


    You can change some of these settings if you wish later on but give those a try and see what it does.
    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.

  7. #7
    Potential Tuner
    Join Date
    Aug 2016
    Posts
    6
    thank you, I will try that and let you know

    //Nybo

  8. #8
    Potential Tuner
    Join Date
    Aug 2016
    Posts
    6
    It work out perfect, now the car running awesome, THANK YOU 5FDP
    If I, by any way can help you or buy you a beer/Coke nexy time iam in the US :-), or if you are gonna go to Denmark I will buy you dinner......

    regards
    Christian Nybo
    nybo-rodshop

  9. #9
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,533
    No problem, those were just some simple changes to get you going.

    I know I didn't explain in alot of detail but I can assume you'll be able to figure it out, high lighting and reading what each table means should help explain things. Those 6.0 computer files are pretty held back from the factory, more for comfort and trying to squeeze mpg out of them.

    You can tweak things how you like anytime you want too and if you get a wideband someday you can really fine tune WOT fueling and timing to get the most out of it. Also if you changed anything like the intake manifold or intake tubing and MAF placement there will be some fine VE and MAF tuning wanted to get things back square.
    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.