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Thread: help obd1 your my only hope have strange readings on tuner??

  1. #1
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    help obd1 your my only hope have strange readings on tuner??

    well first off thanks the force is strong here took me a while but i now can log on and read but its all weird.readings dont stay stable. temps are at - temps ramp up and down as with all others tack,oil,etc the dark side is close .with my buick roadmaster 1994..the star wars skit was pretty good though

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    Like Jar Jar that is very annoying!

    Use the XDF and ADX file from this thread, connect after engine is running. I made these on my 1994 RoadMaster Wagon.
    http://www.gearhead-efi.com/Fuel-Inj...rmation-EE-EEB
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  3. #3
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    thanks mark I did both i notice it freaks out on first try so i unplug usb and replug hit connect seems to work then so now ive rec data and replayed it how do i know whats right and whats wrong ..also whenscrolling down engine data to the faults they show ok... if on fault what would it say?..so so much to ask thank you guys for your help ...END OF LINE.............

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    Not sure why your having an issue with a RoadMaster? Other LT1 vehicles have reported that first time fails and a disconnect and reconnect works every time. No need to unplug USB, just disconnect and connect commands in TunerPRo. The LT1 in different cars has different modules tied into ALDL line, Roadmaster has the most and they are all silenced so this is probably their issue. Those commands could be removed in Editing the adx file.

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  5. #5
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    hi also right too the left of da not connected theres a hz speed should that stay steady or vary ???6.57hz to 8.24hz every other sec

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    RIP EagleMark's Avatar
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    Yes they vary.

    Are you getting good data? Post a data log...

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    Quote Originally Posted by swat455 View Post
    ..also whenscrolling down engine data to the faults they show ok... if on fault what would it say?
    Error! Because that's what I put there. These files are totally customizable, some have nothing when no error or ? when there is one. Depends on who wrote it and how much time they put into it.

    Like this $EE when in PE Power Enrichment it says BIG POWER!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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    hi how would i go posting a data log on here as I have a 15 min log from this morn on her

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    Reply to thread, go advanced and under the text box is Manage attachments.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  10. #10
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    hope this is my data

    well I hope thats it
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    does it look norm?????also is the a referance program that shows me what the engine data should be beside the real data ?
    Last edited by swat455; 04-03-2013 at 04:51 AM.

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    hi sorry to keep askin ??but i think i see that i can compare bins against my own anybody have a stock 94 roadmaster bin??thats the data right? also i see theres cords forsale. ones that have both 12 and 16 pin those you can reflash the pcm with ??as mines just for data???also does he make a 3 way with obd2????
    Last edited by swat455; 04-03-2013 at 06:33 AM.

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    Yes the data is recording just fine! Looking at BLM Right and Left history tables you have one side lean? Also getting some knock retard in areas where you should not. May have a lean cylinder or injector issue? Play your log back and look through history tables.

    Not sure why your cable won't flash? But Robert knows all about the cables and sells some, look here and give him a PM.
    http://www.gearhead-efi.com/Fuel-Inj...uy-ALDL-Cables!

    There's a info thread for this $EE mask with lots of bins.
    http://www.gearhead-efi.com/Fuel-Inj...rmation-EE-EEB

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  14. #14
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    ok ok.. so what i see when i look in hist. is the lower the number the leaner and i would say thats the leftside and average/ideal is 140???above that and its rich.is that correct?

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    Ideal is 128.

    From the EFI Dictionary:
    http://www.gearhead-efi.com/gm-ecm-p...ictionary.html

    INT = The short term fuel trim value is called the Integrator The value of the integrator varies above and below 128 with 128 being no correction. For example, if the Integrator is 135, the ECM is adding fuel because the 02 sensor is reading a lean mixture. If the Integrator is 110, the ECM is removing fuel because the 02 sensor is reading a rich mixture. Anytime the system is not in closed loop, the Integrator will immediately return to a value of 128 and stay there.

    BLM = Block Learn Multiplier. Block Learn Mode term is long term fuel trim. BLM value tracks the Integrator but has a delay. If the Integrator increases so does the BLM, but the BLM lags behind the Integrator. The higher the Integrator climbs above 128, the faster the BLM rises. BLM value affects the VE table by adding fuel above 128 and subtracting fuel below 128

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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