HPX wiring

Lemme go take a pic of mine but just quickly looking at zbums, it seems right.

A pic would be great

Isn't the HPX 3-wire like the Q45 ?

My cobra connector was 3 wire. And grounds should be crossed…

There's info on the wiring on the Nistune site too.

http://nistune.com/docs/MAF_and_Consult_pinouts.pdf

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:

Looks to me like Pin 3 from the Mustang harness needs to go to what was connected to Pin B on the Z31.

^agreed. your ecu has had the maf mods done as well i suspect.

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.

Uhhhh.....noooo. This is new info to me. Someone spoon feed me the link to the ECU mod for MAF please.

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.

^the procedure is different, depending on which ECU range youre working with.

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.