z32 MAF wiring question

[andromeda]

just wondering if this is right. trying to get this n62 maf to work on my 91 240. I followed this diagram http://jimwolftechnology.com/w...S.PDF and i think i did it right, but my ecu is flashing the code for maf and my car is running like poo so just wanna double check my work before i rule that its the part itself that is bad. thanks alot! also i have the solid black wire running to a ground on the car

[Hijacker]

Solder those connections. The ECU will flip out if there's any oddities in the signal transmission, such as if you use crimp connectors. If it's still flipping out, then come back.

Also, where's your extra ground wired into? You only show the three wires being connected to the harness. Where's the 4th?

[andromeda]

ok will do and the black is grounded to the car

[andromeda]

so the wires are in the correct spots i just need to solder them correct? and the black is supposed to be to a chassis ground right? just wanna make sure thats it

[Hijacker]

Yes.

You can also tap the extra ground into the existing grounding system as well, but chassis grounding is just as good. The main wire you're concerned with is the signal wire (white)

That wire sends a varied voltage reading to the ECU, if it's sending funny signals, the ECU wigs out.

[andromeda]

ok thanks bro. ill go solder it now

[andromeda]

i soldered the wires and shrink tubed them still throwing up code 12. also put a volt meter on the o2 sensor on the downpipe and there is no signal to any of those wires. so one more problem to look into (i was wondering why my a/f gauge didnt read anything)

I noticed some wires are cut on the ecu, but i looked at the pin out diagram and it shows they arent used, but i took a pic just to make sure.

[andromeda]

any idea on what would cause the o2 sensor wires to be dead?

[tctomasc]

Vibration and heat combined together can usually make some pretty nasty holes in wires. Check under all your insulation even if it looks fine, underneath you might find wires with saw patterns in them from the surrounding plastic insulation.

[andromeda]

ok cool. ill check

[tctomasc]

you gotta be kidding me tho. Sorry, but I would drive that 6 4 everywhere. Why are you selling it???

[Hijacker]

The O2 sensor wire is an on/off circuit. The o2 circuit completes based on what the sensor detects. The wire should go hot if you manually ground the sensor circuit. you may have a continuity issue if you're getting no voltage to that circuit when you ground it out.

Looking at your pic, the cut white wire should be the MAF signal wire. Looking at my pinout, the only white wire near the securing bolt is in pin 16, which is two pins from the bolt. Pin 15 must be hidden in your pic, because it should be a green wire that goes to the consult port.

The cut green/black is a consult wire

The other cut wire goes to the JDM fuel pump control module (my circuit diagram makes it seem like the JDM pumps were multi speed)

Find the MAF signal wire and where it was cut and fix the circuit. Then I bet your car will run.

[andromeda]

you gotta be kidding me tho. Sorry, but I would drive that 6 4 everywhere. Why are you selling it???

i have been regretting selling it ever since haha. I was sick of it when i had it, but now im just like omg youre a moron for selling it. Was my first car too. bahhh im actually looking for a new classic.

and thanks a million hijacker! ill post back later

[andromeda]

hijacker you so smart. that was the prob with the mafs. i found the wire and soldered them together and that prob is fixed! took it for a test drive and its pretty sluggish and not really running that great. not sure what the deal is now. No codes coming up. It wont idle and doesnt really seem to accelerate too well when it hits boost.

[Hijacker]

Check for boost leaks. Also, the car probably has a lot of crud in the motor from the MAF not running right, so it just needs time to blow some of the junk out. Drive it around for a few days and see if it gets better

[andromeda]

ok will do. thanks again man. id be lost without the help

[ZOMG.SR20]

Yes.

You can also tap the extra ground into the existing grounding system as well, but chassis grounding is just as good. The main wire you're concerned with is the signal wire (white)

That wire sends a varied voltage reading to the ECU, if it's sending funny signals, the ECU wigs out.

umm ill ask this here what should i do with this mess its a stock KA MAFs could this be the cause of my car running awful

[Hijacker]

It's possible. Whoever did that wiring job should be shot (hoping it's not you )

[ZOMG.SR20]

was not me my so called friend

[400whps13coupe]

andromeda is your ecu rechipped for the z32 maf or at least a piggy back computer you didnt just wire it into the stock ecu did u that will not work at all. ............ oops old thread