Saturday, February 06, 2010

Running both MAF and MAP sensor in the ER34?

As a follow up to my previous post on the Apexi Power FC, I wish to share that the Power FC unit that I have, which is the L-Jetro version runs on Mass Airflow Sensor (MAF). And of course I'm going to pair it with the Z32 AFM for bigger flow measuring potential.

There is also D-Jetro version of the Power FC. D-Jetro on the other hand uses a Manifold Absolute Pressure Sensor (MAP). There is no D-Jetro version of the Power FC for the ER34 but is available for the BNR34.

Pic 1: Apexi Boost Control Kit

So anyway, my point is that the Power FC will not be able to read the boost reading via the hand commander as it has no method of reading it in via the stock ECU loom. There is a way to get around this though and that is to purchase the Apexi Boost Control Kit.

Pic 2: Apexi Boost Control Kit

But like mentioned, I've already had the HKS EVC 4 to control my boost and I do not need another boost controller. So what can be done is to get the MAP sensor and MAP sensor harness from the Apexi Boost Control Kit. The solenoid thus is not required. These two items may seem small and trivial but mind you it's not that cheap. Damn JDM stuffs all are costly. WTF!

Two sensors?? Yes, one can run BOTH MAF and MAP in the ER34. :O

How? Well, the MAF will be used for reading the air fuel ratio while the MAP will be used solely for the function monitoring the boost level. The MAP sensor will be connected directly to the Power FC.

Pic 3: MAP Sensor

I was told the MAP sensor is pretty hard to source for a used item. Well, I've got one on hand. :)

Oh, by the way, the MAP sensor is actually made by Denso. One thing to note is that the harness has 3 pins while the Power FC ECU have 5 pins. It will work no worries, just plug it in the middle, i.e. from pin 2 to pin 4.

Pic 4: MAP Sensor

Each pin represents voltage, signal and ground respectively. So there you have it. If you plan to read boost from your Power FC hand commander, you know how it's done. :)

I was going to use it in my car but on second thought, I think I'll put this up for sale. So for those who want to read boost from your Hand Commander, shoot me an email and we can work out a deal.

Pic 4: This is for sale. Yes inclusive of the Samco silicone hoses it will go with.


  1. is that universal across all pfc models or just for the er34?

  2. It's vehicle specific. This suits:-

    Silvia - PS13 (Red Top)
    Silvia - S14 S2
    Silvia - S15
    180SX - RPS13 S2 (Black Head)
    180SX - RPS13 S1 (Red Head)
    180SX - RPS13 S3 (Black Head)
    Skyline - R34 GTT - ER34
    Imprezza - GC8/GF8 Ver3-4
    Imprezza - GC8/GF8 Ver5-6

  3. EJ, put on yr car la....y sell after so much effort getting em? satigue

  4. Satigue, gonna be selling a fair bit of stuffs soon. Need the cash.

  5. Hey EJ,

    The sensor is from Denso and is not vehicle specific. It's the same one used on my HKS F-CON V Pro set up.

    If you need brand new ones, simply order from HKS, they allow purchasing of seperate items.

    BTW; why do you want the boost reading from the hand controller? Your EVC4 has a much nicer display.


    [Project R34 - SATANIC]

  6. Hi Stan. Yeap it is made by Denso. You're right, I can read the boost via the EVC. Thus I am selling off this MAP sensor. :)

  7. Item sold to a fellow Skyline owner in France. :)

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