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Thread: Ethanol Sensor on MAF circuit LS1

  1. #1
    Lifetime Member macca_779's Avatar
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    Default Ethanol Sensor on MAF circuit LS1

    Guys I have a theory id like to put past the brains trust

    What's everyone's thoughts on using the GM ethanol sensor on an Ls1 by inputting the frequency signal into the MAF circuit which is unused in an SD application

    You would then creat a calc pid to interpret the 50-150hz signal
    Last edited by macca_779; January 19th, 2014 at 01:40 PM.

  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    If you feed a signal in there it will be used again (by the airflow calculations), Mmm, actually if you set the high fail to 20Hz it should stop looking at the signal.
    And is this just for monitoring ethanol % ?
    Last edited by GMPX; January 19th, 2014 at 06:44 PM.
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  3. #3
    Lifetime Member macca_779's Avatar
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    Default Ethanol Sensor on MAF circuit LS1

    Quote Originally Posted by GMPX View Post
    If you feed a signal in there it will be used again (by the airflow calculations), Mmm, actually if you set the high fail to 20Hz it should stop looking at the signal.
    And is this just for monitoring ethanol % ?
    That's the theory. The plan is just for scanning. (Unless you guys want to revisit 0411 development hint hint). But yeah anyway saves installing an extra gauge when you could just use the V2.

    I've been told the MAF starts at 1.5khz. But will the PCM still read a lower frequency?

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    Forum tyhee Site Admin GMPX's Avatar
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    Quote Originally Posted by macca_779 View Post
    Unless you guys want to revisit 0411 development hint hint
    Ahhh, no, pretty unlikely, sorry.

    Quote Originally Posted by macca_779 View Post
    I've been told the MAF starts at 1.5khz. But will the PCM still read a lower frequency?
    Actually I have no idea, maybe the other option is to look at other manufacturers who do FlexFuel and see what they use, one of them might be a 0 to 5V signal.
    Need official EFILive help, please go here.
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  5. #5
    Lifetime Member Tre-Cool's Avatar
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    zeitronix can output a 0-5v signal from an flex fuel sensor.

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