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  1. #1
    Carb and Points! lesman's Avatar
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    EGR Delete OBD1 1994 Corvette

    I removed the EGR and AIR Pump when I put headers on the LT1 corvette. I followed a B body EGR Delete that was generated by EEHack online tool. Just compared the bins from a normal LT1 Y body and tried to get everything related to the EGR / AIR pump system. There were too many other related items to check all the differences so I might have missed a couple or so.
    When I ran my logs I noticed I was getting an EGR duty cycle on the graph. After seeing this, I zeroed out the EGR Spark Advance Correction ( I missed that one and added it). The spark advance shouldn't happen any more.
    Is there something to stop the duty cycle of the EGR? It shouldn't be calling it all. I put the maximum RPM to 0 and the minimum RPM to 6500 as in the tool generated bin.

  2. #2
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    Quote Originally Posted by lesman View Post
    Is there something to stop the duty cycle of the EGR? It shouldn't be calling it all.
    I put the maximum RPM to 0 and the minimum RPM to 6500 as in the tool generated bin.
    EGR Min MAP > 103KPa
    EGR Enable Min RpM 6375RpM
    EGR Enable Max RpM 6350RpM
    EGR Enable Coolant Temps (both) > 116C

    No need to zero the EGR table with constants set as above.
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  3. #3
    Carb and Points! lesman's Avatar
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    Quote Originally Posted by LeMarky Dissod View Post
    EGR Min MAP > 103KPa
    EGR Enable Min RpM 6375RpM
    EGR Enable Max RpM 6350RpM
    EGR Enable Coolant Temps (both) > 116C

    No need to zero the EGR table with constants set as above.
    I found the first 3 settings but not the 4th (EGR Enable Coolant Temps). I looked through all the tables and scalars. Using TunerPro with EEX.xdf.
    I found the AIR Enable - Min Coolant Temp and I added 116 for that.
    Last edited by lesman; 03-25-2023 at 05:41 AM.

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    Yes, some of the early stuff was in weird areas, IAT enable egr, watch for that. Either way, it's a one way, both have to pass enable check to qualify. :)
    -Carl

  5. #5
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    Quote Originally Posted by lesman View Post
    I found the first 3 settings but not the 4th (EGR Enable Coolant Temps). I looked through all the tables and scalars. Using TunerPro with EEX.xdf.
    I found the AIR Enable - Min Coolant Temp and I added 116 for that.
    The two EGR Enable Coolant Temp addresses are 2617 and 2618. You can find them using EEXTRA v0[1].001[MOD_V0005_03_02]V6_3.xdf, which can be found here: http://www.gearhead-efi.com/Fuel-Inj...ll=1#post92678
    1990 Corvette (Manual)
    1994 Corvette (Automatic)
    1995 Corvette (Manual)

  6. #6
    Carb and Points! lesman's Avatar
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    I tried downloading the file but its doesn't load as a valid ZIP file but a RAR file with a ZIP extension add on. When I remove the zip extension and decompress it, it is EEHack executable only. I do not see any XDF file. Where can I find the correct file noted in the forum?
    If it is not available any more, how do I manually add the parameters in Tuner Pro?
    Is there a way I can create a new scalar in the program and add them that way? and if so, what would that process be?

    Edit:
    I found the XDF file that has a lot of the information you referenced. Also some other EGR settings that could be changed. I am still getting a duty cycle graph on the logger but I did not find the XDF till after I made my trip. It was not the one you referenced on page 10 but the XDF on page 6, version 5.
    I will change the settings and give it another shot.
    Last edited by lesman; 03-26-2023 at 01:39 AM. Reason: update

  7. #7
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    The XDF file is attached directly to the post I linked. It's the XDF that you'd want to edit the BIN. There's no reason to grab that modified EEHack executable if you aren't planning on using the custom patches. Just download the attached XDF by itself.
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