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Thread: Power enrich, but short term fuel trims still pulling fuel out?

  1. #1
    Senior Tuner
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    Power enrich, but short term fuel trims still pulling fuel out?

    If you look at 4:21 for example you see air fuel commanded matches what is in power enrich, manifold pressure is above what it needs to be to be in power enrich but its pulling fuel out until it gets to stoich
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    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  2. #2
    Senior Tuner
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    Jun 2004
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    Baltimore, Md
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    At 4:29 its not doing that until map drops below 110 kPa and tps drops below 36% neither of which is a setpoint for anything
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere

  3. #3
    Senior Tuner Frost's Avatar
    Join Date
    Jan 2006
    Location
    Richmond VA
    Posts
    1,950
    I can't see what you are working with on the PC I'm on... but, I know that PE *MUST* be active before BE or it will still trim, while commanding a richer mixture. Make sure that the TPS requirement has been met. For a test, just set it stupid low. Also set PE/BE slightly different to make it easier to verify that you GOT PE before BE in the log.
    Steve Williams
    TunedbyFrost.com