1jz vvti maf sensor voltage

Thread in 'Technical Questions' started by Miltonmango, May 3, 2020.

  1. Miltonmango

    Miltonmango New Member

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    Hello,

    So I have recently put in a wideband and it is constantly running at around anywhere from 13.6 to 14.3 afr. I have eliminated the fuel system and am basically down to the maf and the ecu. I tested the voltage coming out of the maf going to the ecu and it’s reading 1.6v on idle and throttle, it doesn’t fluctuate. Anyone know what the voltage should be reading? Obviously more than 1.6v on throttle.

    cheers!
     
  2. Spawn_CA18

    Spawn_CA18 Member

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    Have you tried removing the standard o2 sensor plug? Faulty o2 sensor will cause fluctuation .
     
  3. Miltonmango

    Miltonmango New Member

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    I unplugged the sensor and it didn’t make a difference. I have a fpr fitted, tried upping the pressure to 50, 60 and 75 and no change
     
  4. Spawn_CA18

    Spawn_CA18 Member

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    have you checked the leaks on the IC piping or vac hoses? also is it ETCS or ETCS-i 1JZ VVTi?
     
  5. Miltonmango

    Miltonmango New Member

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    No leaks on the cold or hot side. ETCS I believe. It’s a ‘96 jzx100 if that helps with that.
     
  6. Spawn_CA18

    Spawn_CA18 Member

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    ok then, if all those are good, MAF would be a good starting point.

    what you measuring is the air volume, there's also a air temp signal from maf, have you measured that one as well?
     

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