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Thread: ctsv breaking up on the top

  1. #1
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    ctsv breaking up on the top

    so we have an 09 ctsv that has a 2.45 upper and i have addeed the log. the maf is stopping at 86.69lbm for some reason and i am seeing engine tq stop at 640 like i am hitting some load limit what did i miss. timing is safe at 20* and the pump is turned up to 600 kpa as well cady last chance 1.hptcady last run.hplcady 3 good rips.hpl

  2. #2
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    A quick look and it looks like you are getting a few mis fires....did you re-gap your spark plugs after installing the 2.45 pulley? and that is definitely weird how your maf just stops like that...
    Last edited by sgod1100; 08-02-2020 at 09:57 AM.

  3. #3
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    VE airflow stops at 512.0 g/s (67.73 lb/m), and MAF airflow stops at 655.4 g/s (86.69 lb/m) in the scanner. Dynamic Airflow keeps on going though. Log all three and you'll see it.

  4. #4
    Advanced Tuner PGA2B's Avatar
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    What mods have been done?
    2013 OBM A6 CTS-V Coupe
    Mods: Headers back Billy Boat Exhaust, GripTec 2.65, 8.6 PowerBond Lower, LSX Innovations Solid Isolator, ID850's, NGK TR7IX's, Accel 9070CK Wires, Spectre CAI, SRI Ported Throttle Body, SRI Catch Can, NGK AFRM, 160* T-Stat, 0fx2gv Brick, Hard Line Delete W/3/4" Lines, FB 101 FMIC, Pierberg CWA50, Stoptech Drilled/Slotted Rotors, EBC Redstuff, Cut Stock Springs, Flat Bottom Steering Wheel
    2006 Black Raven STS-V (Traded In)
    Fully Modded: 459RWHP@5888rpm/451lbft@4696rpm

  5. #5
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    we found some of it got it back on the dyno an fuel pressure is not holding good its dropping out . didnt lean out on the dyno with less load to turn the drum put some load on it with the eddie brake and load goes nuts injector being to open to add more fuel to. we just have the a 2.45 and bre7ef ngk gap at 35

  6. #6
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    Quote Originally Posted by stick8555 View Post
    so we have an 09 ctsv that has a 2.45 upper and i have addeed the log. the maf is stopping at 86.69lbm for some reason and i am seeing engine tq stop at 640 like i am hitting some load limit what did i miss. timing is safe at 20* and the pump is turned up to 600 kpa as well cady last chance 1.hptcady last run.hplcady 3 good rips.hpl
    I have the same issue with e67 ecu but this is a swap engine, can you please tell me if you solve this issue.

  7. #7
    Advanced Tuner jsllc's Avatar
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    There is no issue. These ECMs use dynamic 100% of the time. Do your homework, plenty of info out there
    2012 ZL1 - Maggie Heartbeat, Port & Polish Heads, Custom Cam, Custom rotating assembly, steel sleeved LS9, No NOS and No water meth. 16psi
    810rwhp and 820rwtq 91 Octane 6400 rpm
    948rwhp and 951rwtq 105 Octane 6400 rpm
    999rwhp and 997rwtq on 60% Ethanol 6400 rpm

  8. #8
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    Quote Originally Posted by jsllc View Post
    There is no issue. These ECMs use dynamic 100% of the time. Do your homework, plenty of info out there
    Do you have any link regard this, that will be greatly appreciated, here attached is my data log
    Attached Files Attached Files

  9. #9
    Advanced Tuner jsllc's Avatar
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    Your data log is missing too many PIDs. What problem do you believe your are having?
    2012 ZL1 - Maggie Heartbeat, Port & Polish Heads, Custom Cam, Custom rotating assembly, steel sleeved LS9, No NOS and No water meth. 16psi
    810rwhp and 820rwtq 91 Octane 6400 rpm
    948rwhp and 951rwtq 105 Octane 6400 rpm
    999rwhp and 997rwtq on 60% Ethanol 6400 rpm

  10. #10
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    Quote Originally Posted by RobZL1 View Post
    VE airflow stops at 512.0 g/s (67.73 lb/m), and MAF airflow stops at 655.4 g/s (86.69 lb/m) in the scanner. Dynamic Airflow keeps on going though. Log all three and you'll see it.
    i've noticed that as well that the maf stops at 655 g/sec...is that normal?

  11. #11
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    Yes. The MAF is still actually working, though.

  12. #12
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    Its seems like the car breaking at wide open above 4000 rpm but the fuel shows around the target, also i notice the cylinder air mass goes too high, can you please let me know what PID's i am missing in data log so i can add them in my channels and do another pull

  13. #13
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    Quote Originally Posted by jsllc View Post
    Your data log is missing too many PIDs. What problem do you believe your are having?
    Its seems like the car breaking at wide open above 4000 rpm but the fuel shows around the target, also i notice the cylinder air mass goes too high (4.21g) that is not normal i believe, can you please let me know what PID's i am missing in data log so i can add them in my channels and do another pull

  14. #14
    Advanced Tuner jsllc's Avatar
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    MAF is not right. Commanding 11 getting 11.78. Set your WB to lambda and then log eq commanded. I attached a Channel file
    Attached Files Attached Files
    2012 ZL1 - Maggie Heartbeat, Port & Polish Heads, Custom Cam, Custom rotating assembly, steel sleeved LS9, No NOS and No water meth. 16psi
    810rwhp and 820rwtq 91 Octane 6400 rpm
    948rwhp and 951rwtq 105 Octane 6400 rpm
    999rwhp and 997rwtq on 60% Ethanol 6400 rpm

  15. #15
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    Quote Originally Posted by jsllc View Post
    MAF is not right. Commanding 11 getting 11.78. Set your WB to lambda and then log eq commanded. I attached a Channel file
    Thanks you very much and appreciated, let me try with this and let me check what exactly the cause.

  16. #16
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    we go some of this fixed with new pumps we have a a 2.45 and 1000fic injector in it. got it back on the dyno after some street hit and are now see the car go full rich above 5500 and i duty cy got up 100 and o2 on dyno show we are going full rich as well to 10. its strange that the car ran fine with no issue for 2 weeks and is no breaking up again. dw 310 pumps i realy dont think the new pump went bad all ready
    will post a log shortly. cady very bad was 8-24-20 and 4 good is2weeks ago just after pump install
    Attached Files Attached Files
    Last edited by stick8555; 08-24-2020 at 03:26 PM.