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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....
deffo on a 99 it doesn't prime the fuel pump.. thought it was the same on the others but perhaps not then soz
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
Yes.. from memory the subaru loom wiring is red, black, black with red trace and white.. red is 12v, black is ground, black with red trace is sensor ground and white is maf signal..
will this z32 maf mate/join the apexi power intake for early ver1/2 impreza models ?
I have original maf with the apexi induction - with the adaptor. If I am to purchase the MAF z32 , will I have to make some labor to connect the MAF to my apexi ? is it possible at all ?
Thread resurection award of the year so far goes to me :-)
Anyhoo, ive just tried to fit an orange STI v3 MAF ( 3 pin ) NOT the Z32 version to an earlier classic running the green maf ( 5 pin) wired it up correctly ( i think )
from 3 pin plug - green (12v) to loom 12v ( red)
from 3 pin plug black ( ground) to loom ground ( black)
from 3 pin plug yellow ( signal ) to loom signal ( white
my loom has an extra ground, i even piggy backed to both grounds on my loom from the 3 pin plug ground, still no change.
altered my ESL software to suit the new maf calibration and scaling factor and well, it dont work lol
Engine load is now constant at 33 idle and rich as a pig and wont rev.
Doesnt matter what alterations i make software wise nothing alters it running rich and engine load 33 at idle.
i was hoping by having the 6s ecu maf calibration and scaling settings it would of been just a case of swapping them over and altering the software
I made a plug ( a nissan injector plug is the same for future reference anybody) that connects onto the orange 3 pin maf but left the other ends loose, so i used small spade type connectors to individually insert into my maf plug on the loom.
signal to signal
ground to ground ( also tried double ground as i say, 5 pin plug has a ground for signal and normal ground)
12v to 12v etc
Unless im missing something ( wiring is not my best fortey lol )
So if we use the pic below for the 3 pin maf connector, ive used the yellow for Maf signal , black for ground and the green for 12v ( this is what i read were the wires to use)
looking at the pic the yellow wire is alot thicker than the others, im now wondering if the yellow is 12v not signal voltage ( 6v)
soz
31 October 2007, 10:05 PM
