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Thread: Cylinder select error

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  1. #1
    Super Moderator Six_Shooter's Avatar
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    When you entered a value in the cyl select scaler, did you enter "6" or the hexidecimal value for 6 cylinder? Many of the XDFs I have come accross are set up to use a hexidecimal value there.
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    Fuel Injected! JeepsAndGuns's Avatar
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    Quote Originally Posted by Six_Shooter View Post
    When you entered a value in the cyl select scaler, did you enter "6" or the hexidecimal value for 6 cylinder? Many of the XDFs I have come accross are set up to use a hexidecimal value there.
    The comments on all the 8D xdf's I have seen say "use 0 for 8 cylinders, use 128 for 4 cylinders, and use 192 for 6 cylinders" So I entered in 192.

    Mark, I will double check my ground for the distributor.
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  3. #3
    Super Moderator dave w's Avatar
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    I'm wondering if the V6 Memcal will work with $8D, even if the cylinder number is set for a 6 cylinder? I've had cylinder select errors using a 7727 / 7730 V6 Memcal with $8D / V8 distributor. I modified the V6 memcal for V8 service and the cylinder select error went away. I've never tried using a V6 Memcal with a V6 distributor and $8D. An option I think I'd try; use a V6 definition with a V6 Memcal and V6 distributor and verify that setup is without errors.

    dave w

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    Fuel Injected! JeepsAndGuns's Avatar
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    I dont think there are any V6 $8D bins out there. The memcal I am using is from a $A1 car. But those are DIS. Are there any 7730/7727 V6 engines that still use a distributor?
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  5. #5
    Super Moderator Six_Shooter's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    I dont think there are any V6 $8D bins out there. The memcal I am using is from a $A1 car. But those are DIS. Are there any 7730/7727 V6 engines that still use a distributor?
    Yes, '90 to '93 3.1 F-body.

    But there are no ignition properties in the LHM side of the MEMCAL. In LHM, base timing is used, with no influence from the ECM, so ignition type really doesn't matter for original application.
    The man who says something is impossible, is usually interrupted by the man doing it.

  6. #6
    Fuel Injected! JeepsAndGuns's Avatar
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    Quote Originally Posted by Six_Shooter View Post
    Yes, '90 to '93 3.1 F-body.

    But there are no ignition properties in the LHM side of the MEMCAL. In LHM, base timing is used, with no influence from the ECM, so ignition type really doesn't matter for original application.
    Those would be $A1 wouldn't they?

    Will $8D even run a 6cyl? If I am getting the cylinder select error with a V6 ($A1) memcal, then what memcal can I use with 8D and a 6cyl? Whats in the memcal that's making this error code pop up?

    I chose $8D over $A1 because 8D is for a distributor and A1 is DIS. My engine uses a distributor.

    Edit: You are correct, spent some time on google and the camaro 3.1's do use a distributor. Are those still $A1? If so, then A1 was used in both distributor and DIS engines?
    So then, would I be better off using A1 instead of 8D?
    Last edited by JeepsAndGuns; 08-01-2012 at 02:06 AM.
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  7. #7
    Super Moderator dave w's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    So then, would I be better off using A1 instead of 8D?
    I would try getting $A1 working with a distributor first, then I'd try figure out if there is a way to get $8D to work with a V6. Using a test bench is a good way to figure this stuff out!

    dave w

  8. #8
    Super Moderator dave w's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    I dont think there are any V6 $8D bins out there. The memcal I am using is from a $A1 car. But those are DIS. Are there any 7730/7727 V6 engines that still use a distributor?
    I've used distributors instead of DIS on the test bench without error. The DIS "Reference High Pulse" is the same signal as the Distributor "Reference High Pulse" being sent to the ECM. I think you will have the same results as I did on your test bench if you send the $A1 definition the V6 Distributor "Reference High Pulse".

    dave w

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