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Thread: Having trouble lately with higher IAT

  1. #31
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    I still have the stock injectors. In theory i would swap them and see no change right? Leaving everything as is.

  2. #32
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    If the stock injectors are the same part number then yes, you should see no change if you leave the tune as it is. If you go lean on the stock injectors then they are flowing less than your current ones and if you go rich then they are flowing more than your current ones.

  3. #33
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    Got dirty. Part #0280155868. Not stock. Googling tells me anything from 36lb to 42lb I'm guessing those numbers come from different rail pressure. Don't know if I have the right injector data or not. Would post but it won't let me attach an Excel file. Could have sworn there were excel files on here before.

  4. #34
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    That's interesting. They should be flowing around 40lbs @4bar. Either your fuel pressure is really low, or your MAF is over-reading airflow for some reason.

    We can test this if you want to run some logs for me.

  5. #35
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    I can take some logs. First I should probably put the right injector data in there.i think I have b3701, b4003, b4005 and whichever the IFR table is I don't remember.

  6. #36
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    I'll set up a tune file for you to use. We need to be in MAF only mode for this test. The starting data is not important... I'll be adjusting the data from the logs.

  7. #37
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    Also, I have not seen a lean condition at wot, cant imagine fuel pressure is low just based on that, but stranger things have happened so it's worth testing.

  8. #38
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    Flash this tune file in and run me a log. As well as what you were logging for me last time, add vehicle speed and commanded AFR.
    Attached Files Attached Files

  9. #39
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    Also, try to get me around 12,000 frames at full operating temperature. Avoid going into PE mode if you can.

  10. #40
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    Added wideband lambda as well. The sensor is old, but hopefully atleast close to right. Calibrated it before putting it back in. I also notice the voltage seems low. Thats something I'll have to look in to.
    Attached Files Attached Files

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