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Thread: Tryiing to log boost on 2009 cts-v

  1. #1
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    Default Tryiing to log boost on 2009 cts-v

    I have tried all of the pids on the scan tool but none of them read correctly? Help I want to log boost. Thanks

  2. #2
    Lifetime Member GMPX's Avatar
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    What is 'not correctly'?
    What were the PID names you tried?
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
    Joe (Moderator) joecar's Avatar
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    Can you post screenshots...

    Have you installed the latest sotware and firmware...?

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    I am logging GM.SIVP super charger inlet pressure. I have tried all the pids that have anything to do with boost. Some off the pids work they just don't read correct boost psi.

  5. #5
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    Still trying to log boost with no luck. What pid is everyone using to log boost on the cts-v's.

  6. #6
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    So I guess nobody logs boost on a cts-v????

  7. #7
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    Quote Originally Posted by joecar View Post
    Can you post screenshots...

    Have you installed the latest sotware and firmware...?
    Yes I Do.

  8. #8
    Lifetime Member GMPX's Avatar
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    I think you need to maybe explain why you think they are not reading correctly.

    GM.IMVP shows you the intake manifold vacuum.
    GM.SIVP shows you the difference between Baro and the Supercharger Inlet Pressure in Vacuum.
    GM.SIAP shows you the Supercharger Inlet Pressure.
    SAE.MAP shows you the Intake Manifold pressure.
    I no longer monitor the forum, please either post your question or create a support ticket.

  9. #9
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    Quote Originally Posted by GMPX View Post
    I think you need to maybe explain why you think they are not reading correctly.

    GM.IMVP shows you the intake manifold vacuum.
    GM.SIVP shows you the difference between Baro and the Supercharger Inlet Pressure in Vacuum.
    GM.SIAP shows you the Supercharger Inlet Pressure.
    SAE.MAP shows you the Intake Manifold pressure.
    I have tried all off the pids you mentioned. I have tried to switching from imperial to metric and the reading are high. I know I am not running 30 psi of boost.

  10. #10

    Default LSA CTSV boost

    The 2009-2011 CTSV and the 2009-2011 ZR1 (E67 ECM) have three different pressure sensors where most of the V8 engines just have one.

    GM.SIAP is supercharger inlet absolute pressure. That is the pressure at the inlet to the supercharger (before the supercharger/after the throttle body). This should never see boost. Engine off it will be atmospheric pressure and when ever the engine is running it will be varying amounts of vacuum depending on the throttle angle, inlet restriction, engine rpm etc. This sensor is mounted on the front cover (inlet) to the supercharger.

    SAE.MAP will show you intake manifold absolute pressure. This will be the boost or engine vacuum depending on the engine conditions (supercharger bypass position, engine rpm, throttle angle). This sensor is mounted on the side of the engine and has a red label.

    SAE.BARO will show you the third sensor. This is the barometric pressure. This sensor is also mounted on the side of the engine (supercharger assembly) but is actually just open to atmosphere.

    Engine off/key on all three should read around 97 to 99 kPa. As you go up in load/rpm and make boost, SAE.MAP should climb, GM.SIAP should go down and SAE.BARO should not change.


    Quote Originally Posted by 600+duramax View Post
    I am logging GM.SIVP super charger inlet pressure. I have tried all the pids that have anything to do with boost. Some off the pids work they just don't read correct boost psi.
    Jason Haines, Project Director
    Lingenfelter Performance Engineering
    http://www.lingenfelter.com
    jhaines@lingenfelter.com
    260-724-2552

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