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Thread: Injector PW Issue

  1. #1
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    Default Injector PW Issue

    Hi all,

    I took a scan today on a quick 15 minute drive, and I noticed something strange with Inj PW values, bank to bank. My pulse width values are different from bank 1 to bank 2 of anywhere from 40% to almost 80%, and I'm in Open Loop so there should be no reason for the difference as far as I can see. I've attached my tune file, in case anyone could have a quick look, and a snip of the log that shows the difference. I've gone over the tune and don't see anything obvious, although I'm still relatively new to this.
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    Last edited by RC1; September 17th, 2021 at 08:32 AM. Reason: Added attachment

  2. #2
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    Okay so after reading through some previous threads, I figured I'd try and disconnect both NB O2's, and voila no more bank to bank differences. So I guess I'm to assume that even though I'm in Open Loop with no LTFT, the STFT's still try and adjust?!

  3. #3
    Joe (Moderator) joecar's Avatar
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    Post some log files.

  4. #4
    Joe (Moderator) joecar's Avatar
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    Swap NBO2's across banks and see if injector pulsewidths follow the NBO2's.

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    Quote Originally Posted by joecar View Post
    Swap NBO2's across banks and see if injector pulsewidths follow the NBO2's.
    Hi Joe,

    I did previously swap the O2's side to side because of what I saw, and the odd reading followed the sensor, so I suspect I may have a bad one. Interesting thing is that I bought new NTK's from a reliable source so I wouldn't have to worry about this kind of stuff. Once I figured out that I had a possible bad sensor, I decided to look into the STFT issue, which is when I found the old thread that mentioned unplugging the O2's. As soon as I did that, everything evened out as far as PW's go.

  6. #6
    Joe (Moderator) joecar's Avatar
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    Do you have a link to the old thread you read, I'm trting to find it.

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    Quote Originally Posted by joecar View Post
    Do you have a link to the old thread you read, I'm trting to find it.
    https://forum.efilive.com/showthread...highlight=stft

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