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  • HPX wiring

    So I'm using a HPX blow through MAF and can't figure out the wiring. The connector is from an 05 ford cobra Pigtail. Colors are Red,Black,Brown,Light Blue, Grey, Grey. AZ bum posted this and I tried wiring it that way (colors are slightly different) but it's still on limp mode. Anyone know how to wire this sucker up>?
    Ford-Cobra-MFA-wiring.jpg
    Usual Z31 suspect: Garage Queen (aka broken)

  • #3
    Lemme go take a pic of mine but just quickly looking at zbums, it seems right.
    "Its the s12's sexy over weight step daughter, the z31"

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    • #4
      A pic would be great
      Usual Z31 suspect: Garage Queen (aka broken)

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      • #5
        Isn't the HPX 3-wire like the Q45 ?

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        • #6
          My cobra connector was 3 wire. And grounds should be crossed...

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          • #7
            There's info on the wiring on the Nistune site too.

            http://nistune.com/docs/MAF_and_Consult_pinouts.pdf
            Prius... because Pretentious wouldn't fit across the back of the car...

            Cheap, Fast, Reliable - pick any two

            My 1986 Turbo Build

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            • #8
              This is what I got
              http://www.ebay.com/itm/281418552406

              The Pigtail is a 2005 mustang pigtail:


              Mustang Pigtail to Z31 connector
              Red - Black/White (power)
              Black - Black (ground)
              brown - black (ground)
              blue - shielded black (output)
              grey - not connected
              grey - not connected

              ^Above set-up is not working. Should I be connecting the red or yellow wire from the Z31. One is the self cleaning which I know I don't need, but the other?

              Z31 VG30 (2 - 7 volt)
              Pin A = Calibration pos (variable resistor)
              Pin B = output voltage (black shielded 2-7 volts)
              Pin C = ground (black - chassis)
              Pin D = ground (black - ECCS)
              Pin E = battery source (12V black striped)
              Pin F = self cleaning mechanism (not used with Z32 MAF)


              I can always hook NIStune up and log until I have a signal from the MAF, but any direction first would be a lot easier if someone has had experience.

              Edit:

              seems that both wires are NOT grounds on mustang MAF. This is the issue. AZ's diagram is wrong:
              Usual Z31 suspect: Garage Queen (aka broken)

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              • #9
                Looks to me like Pin 3 from the Mustang harness needs to go to what was connected to Pin B on the Z31.
                Prius... because Pretentious wouldn't fit across the back of the car...

                Cheap, Fast, Reliable - pick any two

                My 1986 Turbo Build

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                • #10
                  ^agreed. your ecu has had the maf mods done as well i suspect.
                  Hmmm, Whats next?
                  Full Size Bronco, smashing shit.

                  84ZXT

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                  • #11
                    I hope you have modded the ECU board for running 0-5V instead of the factory 2-7V setup... I have the exact same setup on a friends car, with the HPX calibrated for Z32 spec.
                    Damn dirty angels....these cars!

                    Current Daily Driver - 86 Turbo.
                    Under the cover - THE BANANA... that needs to be re-energized.
                    sigpic

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                    • #12
                      Uhhhh.....noooo. This is new info to me. Someone spoon feed me the link to the ECU mod for MAF please.
                      Usual Z31 suspect: Garage Queen (aka broken)

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                      • #13
                        This?
                        The hardware changes required to run a different MAF are simple, and as you have probably already socked your ECU, disconnecting these resistors should be cake (the two parallel ones and r201, I removed R201 and just cut the other two):


                        What did you do to keep limp mode? what new resistor/potentiometer do you place where the old resisters were? Sorry this is not my specialty.
                        Usual Z31 suspect: Garage Queen (aka broken)

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                        • #14
                          ^the procedure is different, depending on which ECU range youre working with.
                          Damn dirty angels....these cars!

                          Current Daily Driver - 86 Turbo.
                          Under the cover - THE BANANA... that needs to be re-energized.
                          sigpic

                          Comment


                          • #15
                            the one you posted is for 88-89 iirc, may include 87 but, that is the procedure. lip mode would stay in theory, never had a maf failure after the mod or even tested it to see.
                            Hmmm, Whats next?
                            Full Size Bronco, smashing shit.

                            84ZXT

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