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Thread: Can someone help me double checking my tune?

  1. #1
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    Can someone help me double checking my tune?

    ok so I'm doing a swap with a stand alone harness, engine is out of a 2008 avalanche LC9 and transmission is out of a 2015 chevy tahoe 6L802wd. I have the E38 and T46 computers out of a 2009 chevy suburban with factory LC9 and 6L80 4wd. I deleted vats turned off DOD and did a complete write. but I can't get any RPM signal. I have checked and the power wire for the harness is getting from 10 to 12 while I'm cranking. I have power and ground at the coils, I haven't check while cranking, also I have no fuel pressure (I have no lines hookup yet). at the crack position sensor I'm getting 5v on A, ground on B and 5v on C. not sure what else it could be unless I screw something with the tune. if somebody can help I'm attaching the tune or if you have any other Idea of what can I check. one more thing the maf is a 213-4222 and map is factory 12594942. any help is appreciated.



    Samurai1.hpt

  2. #2
    Senior Tuner edcmat-l1's Avatar
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    There is nothing "in the tune" that you can do to cause you to lose RPM signal. If you don't have RPM signal, there's nothing you can do "in the tune" to get you RPM signal. Put down the laptop, stop staring at the "toon" and diagnose why you don't have an RPM signal.

    Absolutely nothing you have matches. Good luck with this. If you aren't an expert level diag tech, why on earth would you build such a Frankenstein?

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  3. #3
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    Quote Originally Posted by edcmat-l1 View Post
    There is nothing "in the tune" that you can do to cause you to lose RPM signal. If you don't have RPM signal, there's nothing you can do "in the tune" to get you RPM signal. Put down the laptop, stop staring at the "toon" and diagnose why you don't have an RPM signal.

    Absolutely nothing you have matches. Good luck with this. If you aren't an expert level diag tech, why on earth would you build such a Frankenstein?
    What do you mean it doesn’t match. the ECU and the TCM matches and are from the same vehicle, that matches with the same engine code one year earlier, the only thing that you could say it doesn’t match is the transmission that is a few years newer. seems to me, like you don’t want to help so why even bother writing in the first place? Take a chill pill and take off your keyboard warrior costume . ����

  4. #4
    Senior Tuner edcmat-l1's Avatar
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    Who is the one here asking for help because he doesn't have an RPM signal?

    The engine is a 2008

    The trans is a 2015

    The PCM and TCM are 2009.

    Tell me again what matches?

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  5. #5
    Senior Tuner Lakegoat's Avatar
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    Try using the other RPM in channels. There is RPM (SAE) and another RPM channel. Run both of them. If that doesn't solve it, then on the Crank sensor plug, switch the two outside wires. That may be the culprit or the sensor is bad. Alldata can help you with the wiring
    And where did you get the stand alone harness? If it's China, that's the problem.
    Last edited by Lakegoat; 02-28-2024 at 04:24 AM.
    2000 Camaro SS 2015 L83 port injected, Whipple 3.0, 4L80E, 8.8 Ford
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  6. #6
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    Quote Originally Posted by toroz06 View Post
    ok so I'm doing a swap with a stand alone harness, engine is out of a 2008 avalanche LC9 and transmission is out of a 2015 chevy tahoe 6L802wd. I have the E38 and T46 computers out of a 2009 chevy suburban with factory LC9 and 6L80 4wd. I deleted vats turned off DOD and did a complete write. but I can't get any RPM signal. I have checked and the power wire for the harness is getting from 10 to 12 while I'm cranking. I have power and ground at the coils, I haven't check while cranking, also I have no fuel pressure (I have no lines hookup yet). at the crack position sensor I'm getting 5v on A, ground on B and 5v on C. not sure what else it could be unless I screw something with the tune. if somebody can help I'm attaching the tune or if you have any other Idea of what can I check. one more thing the maf is a 213-4222 and map is factory 12594942. any help is appreciated.



    Samurai1.hpt
    Go into the General tab and change the Tach Output signal to "Crank"

  7. #7
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    Quote Originally Posted by LS ROB View Post
    Go into the General tab and change the Tach Output signal to "Crank"
    That is just to get a TACH output to a gauge. If it doesn't a crank signal... that isn't related.
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  8. #8
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    Quote Originally Posted by Alvin View Post
    That is just to get a TACH output to a gauge. If it doesn't a crank signal... that isn't related.
    I see. I must have misunderstood what OP was stating.

  9. #9
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    Ok I got it running, my cam sensor was bad. I actually figured out next day but forgot to come back for the update.I was getting all the signals but no joy. Thanks for the help to all of you that tried giving advice, I guess my Frankenstein wasn’t that Frankenstein after all. Some people are just sad, I feel for his wife lol. Probably doesn’t have one and is still virgin

  10. #10
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    Quote Originally Posted by toroz06 View Post
    Ok I got it running,
    youre probbaly going to be banned soon
    hes one of the top guys in here for help.

    your replies make you sound like the sad one in here.

  11. #11
    Senior Tuner edcmat-l1's Avatar
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    Lol

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