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Thread: getting knock under wot

  1. #101
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    It's the same. High 13's to low 14's. Could be the gauge, a difference in ground potentials, or the prolink cable, who knows. Get the serial-usb stuff.

  2. #102
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    I was saying to myself the same thing if this don't work it could be the gauge itself giving false information.

  3. #103
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    Quote Originally Posted by smasher View Post
    I was saying to myself the same thing if this don't work it could be the gauge itself giving false information.
    Video gauge and voltmeter on the analog output wires at the same time and see if they "match".

  4. #104
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    Why? We know it's wrong. It's occurs during WOT, so why beat on the motor for an answer we already have.

  5. #105
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    Quote Originally Posted by SiriusC1024 View Post
    Why? We know it's wrong. It's occurs during WOT, so why beat on the motor for an answer we already have.
    Because if the analog output and the gauge doesn't match, then he needs a new gauge. Doesn't matter how the data is gotten into the log.

  6. #106
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    Perhaps. The conversion of wideband 0-5 to AFR readout works fine, as is indicated on the gauge. The gauge LED readout and the outputs all come from that same source. If the analog side is bad due to circuitry, such as an amplifier, then the serial side is probably fine because it's a different circuit.

  7. #107
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    Quote Originally Posted by SiriusC1024 View Post
    Perhaps. The conversion of wideband 0-5 to AFR readout works fine, as is indicated on the gauge. The gauge LED readout and the outputs all come from that same source. If the analog side is bad due to circuitry, such as an amplifier, then the serial side is probably fine because it's a different circuit.
    Many years ago I had that exact situation with an innovate wideband. A bad wiring job took out the analog outputs, but the serial still worked fine.

  8. #108
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    Trying the serial port method all day and can't seem to figure it out. ground 5 data 2 on female breakout connector. 5 has to be ground for sure it won't even come on without it. any ideas on this method?

  9. #109
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    Blue 2, Black 5. What do you mean it won't come on without pin 5? The wideband gauge? Make sure black ground goes both to pin 5 and battery ground. Don't try to power the wideband through the serial cable by making pin 5 the only ground. Make sure drivers are installed under device manager in Windows. PID is External Inputs>Serial Port>AEM

    Was that what you did on the analog side? Sensor ground and power ground are separate on the analog output.

    Another thing, and I should have mentioned this, is to make sure your model even has serial output. Look at pg 3 of the manual. Check that pin 5 connector A has a pin out of the gauge. Some have this as optional.
    Last edited by SiriusC1024; 09-19-2024 at 12:18 AM.

  10. #110
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    are you using a usb hub or you plugging them both into the laptop? drivers are good. ground is grounded to the truck and connected to 5. I guess what I'm saying is that it all has to be plugged into the laptop, or the gauge won't come on like it completes the circuit. i would have thought the red, black cable alone would at least turn the gauge on
    Last edited by smasher; 09-19-2024 at 12:29 AM.

  11. #111
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    See that's not right. The gauge should come on with just 12V and battery ground alone. Connect wideband ground to the ground post under the dash (or wherever you find one). Make that happen first. Then connect serial ground pin 5 to the same post.

    No hub. Serial-usb cable between laptop and female serial port. Plugging both what? There's just one serial cable.
    Last edited by SiriusC1024; 09-19-2024 at 12:33 AM.

  12. #112
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    fixed the ground issue I was having it wasn't very good but still won't work

  13. #113

  14. #114
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    I wasn't able to get the serial to work but I went back to the analog after fixing the ground and I think its correct. The knock is back also.
    Attached Files Attached Files

  15. #115
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    Yes it is working. Did you do anything differently?

    Pretty good for using fuel trims and projecting across the table wouldn't you say?

  16. #116
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    yes sir, runs great for sure. What a nightmare that wideband was lol. I'm guessing that's why it doesn't like to get off the line that well is because of the kr. I'm wonder if there's some sort of delay in reading it or it just doesn't do it all the time.
    Last edited by smasher; 09-19-2024 at 01:58 AM.

  17. #117
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    This KR is a goofy problem. It's no coincidence that it occurs at PE every time and registers max. I messed with some stuff in the tune that might be off and affect something behind the scenes. VE adjusted a little.

    Clear LTFT's and log. LTFT's are disabled now for PE tuning with the wideband, but they still need zeroed.

    Then do a separate log to show me it accelerating like a buick lesabre lol.
    Attached Files Attached Files

  18. #118
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    I wonder if the knock sensor problems are still present. Before you load that tune go into Engine Diag>DTC's>P0327 and P0332 and set them to MIL on First Error. Save then write it. Add burst knock to the log. I've disabled it in the tune, but still.

  19. #119
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    Well, it's not a Buick anymore lol I was able to rip the tires off.
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  20. #120
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    Giddyup. I'll get back at it tomorrow for you. Stay out of it, though. Little lean up top.