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Thread: Turn EGR back on

  1. #1
    Fuel Injected!
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    Turn EGR back on

    I need to turn the EGR back on for emission testing. Three things that I'm not sure where they need to be set.
    EGR Min TPS to allow EGR on mine is set at 80%
    EGR On Low VAC Kpa mine is set for 30 Hex
    EGR On Hi VAC Kpa mine is set for 38 Hex

    1991 GMC 5.7 auto using an ADSU bin

    Are these the stock settings for me.

  2. #2
    Fuel Injected! bybyc5's Avatar
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    I would say it's definitly not stock.
    Egr should come on part throttle, not 80%..that's close to wot. You don't want EGR flow during a hard almost WOT acceleration.

    Can you open your stock bin file and compare ?
    04 Lightning Pullies n Tune CAI
    96 Formula WS-6 m6 383 LE3-Heads/GM847/N2O/ Ford 9" 4:33/Sus Work/Stickies/TunerProRT
    93 K1500 383 LT1 with Low RPM 4x4 torque cam

  3. #3
    Fuel Injected!
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    I opened two stock bins and they ere the same. That's why I was looking to see what hey sholdbe set at.

  4. #4
    Fuel Injected! bybyc5's Avatar
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    I opened a stock bin for my K1500, and here is the settings for my "stock" 16168625 $E6.

    TPS for EGR 2.4%

    Maximum TPS for EGR enable 64.8%

    Lower Map for EGR on 24.4 kpa

    Upper Map for EGR on 96.3

    For EGR to be enabled (or disabled for that matter), there are a lot more parameters to qualify ON or Off or even partial flow in the bin I have opened. And likely your bin as well.

    So for the 4 listed above:
    Any TPS between 2.4% and 64.8% qualifies for egr flow...
    Then any map (VAC) reading between 96.3 kpa and 24.4 kpa qualifies for egr flow.

    So the settings in your bin appear to have been modified for little to no flow. At 80% tps and between 30 and 38 kps you qualify for egr flow? I can't see that being correct.

    How do they test your vehicle? Visual, Idle or on a tread mill for part throttle cruise? 4 gas analyzer or just pull codes?
    04 Lightning Pullies n Tune CAI
    96 Formula WS-6 m6 383 LE3-Heads/GM847/N2O/ Ford 9" 4:33/Sus Work/Stickies/TunerProRT
    93 K1500 383 LT1 with Low RPM 4x4 torque cam

  5. #5
    Fuel Injected!
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    I was looking at the BIN with $42-1227747-V5.9.3 XDL and $42-1227747-V5.2 ADX in TP. I loaded up the 42 XDL and 42 ADX and got the same figures that you did.
    Thanks for your input

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