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Thread: Runs worse as it learns....

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  1. #1
    LT1 specialist steveo's Avatar
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    Quote Originally Posted by mikeames View Post
    I strongly suspect my timing match is botched, but I don't know how to fix it.
    well you did kinda patch it up by dropping 8 degrees at the distributor. perhaps in that case dropping 8 degrees across the map, putting it back to normal at the distributor, then slowly bringing it back up would be a good starting point...

    but without a knock sensor, kinda hard to do any decent knock logging; so perhaps you should consider installing one?

  2. #2
    Carb and Points!
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    Quote Originally Posted by steveo View Post
    well you did kinda patch it up by dropping 8 degrees at the distributor. perhaps in that case dropping 8 degrees across the map, putting it back to normal at the distributor, then slowly bringing it back up would be a good starting point...

    but without a knock sensor, kinda hard to do any decent knock logging; so perhaps you should consider installing one?
    I have considered that, but wouldn't I need to reburn the chip. I don't know how to do that.

  3. #3
    Fuel Injected!
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    Quote Originally Posted by steveo View Post
    well you did kinda patch it up by dropping 8 degrees at the distributor. perhaps in that case dropping 8 degrees across the map, putting it back to normal at the distributor, then slowly bringing it back up would be a good starting point...

    but without a knock sensor, kinda hard to do any decent knock logging; so perhaps you should consider installing one?
    If he is running the 7747 without a knock sensor and has not turned off the forced knock test there is a good chance its the test itself not the spark map causing the knock.

  4. #4
    RIP EagleMark's Avatar
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    Quote Originally Posted by Fast355 View Post
    If he is running the 7747 without a knock sensor and has not turned off the forced knock test there is a good chance its the test itself not the spark map causing the knock.
    If he is running with no knock sensor and it is not turned off properly in 1227747 then the knock count just keep counting and pulling knock retard timing.

    The forced Knock test is run during PE, WOT... just when you need forced knock right? D'oh!

    If you have some high pixel size pictures of under hood EFI install I can usually spot any issues like high voltage RFI noise interfering!

    It's time for you to get a ALDL cable and TunerPro RT to do some data logging! We'll find the issue.

    AFI used to have great customer service... when I worked there!

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

  5. #5
    billygraves
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    Last edited by billygraves; 06-30-2019 at 06:25 PM.

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