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Thread: commanded PE issue... im lost

  1. #1
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    commanded PE issue... im lost

    I have been battling this commanded PE issue for a little while and cant figure it out on my 2001 C5Z. its stock with a blackwing

    I dont know what else can influence my Commanded PE for this issue im not understanding.

    I have it set to 1.17 across the rpm range and it will command 12.53(1.17) for a gear. I shift to the next gear and it will still command 12.5 then randomly command 11.8...

    im lost and dont know what else i can do to not have that happen.

    here is a picture of the run
    rich PE.PNG

    attached is my tune myZ06working.hpt

    Thanks!

  2. #2
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    Can you post your log as well instead of just a picture?
    Sort of looks like your WB is not working there....
    Y2K C5 A4 Coupe (10.78 @ 127) Cathedral port 6.2
    S476 L33 5.3 69 Nova 8.76 @ 158 Drive to the track street race car
    06 Cobalt SS bought new

  3. #3
    Senior Tuner LSxpwrdZ's Avatar
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    CAT overtemp probably...
    James Short - [email protected]
    Located in Central Kentucky
    ShorTuning
    2020 Camaro 2SS | BTR 230 | GPI CNC Heads | MSD Intake | Rotofab | 2" LT's | Flex Fuel | 638rwhp / 540rwtq
    2002 Camaro | LSX 427 | CID LS7's | Twin GT5088's | Haltech Nexus R5 | RPM TH400

  4. #4
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    Quote Originally Posted by RonSSnova View Post
    Can you post your log as well instead of just a picture?
    Sort of looks like your WB is not working there....
    I do not have my wideband connected to the hardware at the moment. I didnt save that log...

    Quote Originally Posted by LSxpwrdZ View Post
    CAT overtemp probably...
    Thats a good idea. I should play around with that to make sure.
    how does it determine COT?

  5. #5
    Senior Tuner LSxpwrdZ's Avatar
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    Just turn it off or reduce the max enrichment to something less than your PE ratio.
    James Short - [email protected]
    Located in Central Kentucky
    ShorTuning
    2020 Camaro 2SS | BTR 230 | GPI CNC Heads | MSD Intake | Rotofab | 2" LT's | Flex Fuel | 638rwhp / 540rwtq
    2002 Camaro | LSX 427 | CID LS7's | Twin GT5088's | Haltech Nexus R5 | RPM TH400

  6. #6
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    Here is some reading

    http://www.hptuners.com/help/vcm_edi...g_fuel_cot.htm

    http://www.hptuners.com/forum/showth...temp)-question

    From just a quick read, it looks like the stock tune sets
    afr to you guessed it, 11.8:1 when the ecm thinks the cats are in danger.....

    Turn it off and try again.

    Ron
    Y2K C5 A4 Coupe (10.78 @ 127) Cathedral port 6.2
    S476 L33 5.3 69 Nova 8.76 @ 158 Drive to the track street race car
    06 Cobalt SS bought new

  7. #7
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    Quote Originally Posted by LSxpwrdZ View Post
    Just turn it off or reduce the max enrichment to something less than your PE ratio.
    That seemed to be the culprit. it makes sense though. i was getting and enrichment value of 11.8 and the cal value was 1.25 with figures to be that afr number...

    Quote Originally Posted by RonSSnova View Post
    Here is some reading

    http://www.hptuners.com/help/vcm_edi...g_fuel_cot.htm

    http://www.hptuners.com/forum/showth...temp)-question

    From just a quick read, it looks like the stock tune sets
    afr to you guessed it, 11.8:1 when the ecm thinks the cats are in danger.....

    Turn it off and try again.

    Ron
    Thanks Ron! that did the trick
    appreciate all the help!

  8. #8
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    Yahoo!

    Ron
    Y2K C5 A4 Coupe (10.78 @ 127) Cathedral port 6.2
    S476 L33 5.3 69 Nova 8.76 @ 158 Drive to the track street race car
    06 Cobalt SS bought new