I've just bought a Z32 maf off ebay complete with the wiring and plug.

Can anyone tell me how to wire it up to a '96 wrx ?

 

Z32 connector has 6 pins labelled A to F:
A - Not connected
B - MAF Output Signal
C - Gnd
D - Gnd
E - +12V
F - Not connected

Subaru 92-96 MAF Connector has 5 pins:
1 - +12V
2 - Gnd
3 - Sensor Gnd
4 - MAF Signal
5 - Not connected

just make sure you keep the gnds separate.. if the gnds in the wiring loom are connected the powerfc won't power up.. check immobiliser anyone

Simon

 

how do u know which ground is which on the Z32 maf?

 

doesn't matter..

 

Can I just cut the plug off the original maf connector and join the wires up accordingly to the plug that comes with the z32 ?

 

pos 3 on the power fc aswell

 

personnaly I prefer to leave the original plug on and solder into the loom so you can switch between them if you ever need to refit original maf.. but yes you could just cut it off and solder the new one on

 

Is this a simple mod to do or is there anything else thats needed to be done, like the ecu side. And why use a nissan maf, is it better or just down to cost

 

The Z32 maf will support a higher power output than the standard unit...You will need either a remap ala ESL or similar (Simon can sort you out there) or an Apexi Power FC....

 

what a maf ??????????????????

 

By "leave the original plug on and solder into the loom" do you mean that I will have 2 plugs then. The original one and the plug for the Z32 ?

 

has anyone fitted the orange maf with only one earth?
what do you do with the left over earth from loom?

 

Join them together.....

 

just make sure you keep the gnds separate.. if the gnds in the wiring loom are connected the powerfc won't power up.. check immobiliser anyone

this was posted uptop?????????????????????????

 

yes.. then you can continue using the car on the original.. switch within 2minutes to map it etc.. and then if you sell the car and want to return it to standard it is an easy plug and play..

 

the powerfc won't prime the fuel pump when you do that.. no idea why.. also not sure if it is all years.. very weird though..

Simon

 

just leave it disconnected.

 

cheers
just max my maf out so got to fit this quick befor i can do anymore work

 

Thanks mate. You don't by any chance know what K+N filter I can buy to fit on its own without the kit ? I had a kit but the filter got damaged,just want to buy a filter on it's own ?

 

whats the wires for the sti 4 and the q45 maf

cheers david

 

the apexi induction kit is very good price and works well..

but to just replace the filter you would be best speaking with K&N I guess.

Simon

 

now your asking.. I have the sti4 wiring around here somewhere.. but not sure if I have the q45.. will try and look

AndrewC is the wiring master.. he'd know!

Simon

 

sti4 I believe is

I believe is wired in yellow (12v), black/green(GND) and green is signal.. or
it is the version with red (12v), black (gnd) and white (signal)..

haven't found the q45 maf wiring yet though

 

Q45 MAF only has 3 pins, B, D & E same pin assignment as Z32:
B - MAF Output Signal
D - Gnd
E - +12V

STi4 connector is also 3 pins:
1 - MAF Signal (Colour can vary)
2 - Gnd (Black/Green)
3 - +12v (Green)

 

see told you he was the wiring master

 

I meant to ask: why would you want to fit a Q45 MAF to an STi4 ?

Andrew...

 

ive got a sti 4 and a q45 maf that im going to be fitting to my 93 wrx but ive not decided what 1 to fit yet


cheers david

 

just to make sure i have this right then,i got hold of a z32 maf and a old green label subaru maf and took the end off the subaru maf and have soldered it on to the z32 maf wiring plug so that i can swop between the two if i had to and means i keep the wiring loom on the car un-touched,as pic below


so i have connected it as so
b on the z32 maf to pin number 4 on the subaru one(this wire is shielded)
c on the z32 maf to pin number 3 on the subaru one(this wire is shielded)
d on the z32 maf to pin number 2 on the subaru one
e on the z32 maf to pin number 1 on the subaru one

 

 

Had a chat with my teccy today re this...Every STi4 maf we have modded to fit an early classic has been wired with the earths joined all with no issues..Probably haven't done as many as yourself but haven't found one yet that wouldn't run when wired this way....