maf probs.

[s13_chris]

My maf has power to 1 of the 3 plugs in the maf plugin . I just double checked all connections to ECU and everythings fine. No cut wires near MAF plug either. So leads me to grounds. 3000rpm limit like usual, cleaned it, again it has power to 1 of the 3 plugs so I would figure a ground issue but idk right now. im searching currently and many forums...This situation is new. The only recent thing I've done is put in new front clear turn signals so I'm baffled right now. I switched out my MAF for a buddies too and nothing. So confused. Anything i'm missing guys.

[zach-Ka]

Just cut the ground coming off the plug and ground it to the chassis.

[s13_chris]

which wires are the ground? the two that arn't lighting up?? and if that does not work what then. i'm getting power to maf. but it wont let me go above 3000rpm,switched with another maf sensor and nothing. will switch again. code 55 still.

[Justin35ll]

well if theres 3 wires i think one is 12v, one is prob a 5v reference, and the other ground so 2 of them should have power are you using a volt meter on them to see what the voltages are

[zach-Ka]

The black is your ground and white is the signal wire.After doing that I would check all wiring.

[s13_chris]

Which brings me to my next question. The signal wire/ground/power constant go where? I'm working off this pinout for a sr20det diagram. It matches this diagram for a ka24e ( http://i28.tinypic.com/311ngqx.jpg ).

So the ground and signal input (i'm assuming signalwire) are the only ones that come to it? So does it just get its constant 12v from somewhere else?

Also, pin 47/38 share the same wire. The CAS, MAF, ECU, ECCS, Relay Switch Postive. Is that a relay? And if so could a bad relay be causing all this?

Next thing, after furthur investigating pin 16/17, I'm going to try a different ecu and see if that does anything. Thanks for the help so far.

[zach-Ka]

I dont think it is a relay, All those things get 12v power only when ignition is on.When I was simplifying my harness I noticed all three of those pins (109,47,38) all join to one connection later on in the harness closer to the two plugs that connect to the front harness. Then one single wire goes to the mafs.

[s13_chris]

Well I tried a new ecu. Nothing. Same problem. I tried fixing the dips*** before me, all his s***ty solder around the ecu and got them to what I think is 100% with butt connecters and new stripped wire. I checked the extension part of the MAF when the car was getting wired and it looks good. Also, my car gets Code 12 (loose MAF plug), so does that rule out that my MAF is getting power. Stuff like that?

My deadline is this afternoon basically in which I will be taking it to an auto electrician that I know that hasn't been stumped by any of my issues yet. But I REALLY want to figure it out myself.

[s13_chris]

Oh and you were saying to ground the MAF plug...What you are saying is to cut the black ground wire and ground BOTH ends (plug side and harness side) to a good solid ground point?

[s13_chris]

One more thing, my multimeter broke so I cant get stuff like that. But I am using a test light and the White wire (signal wire) is getting no power with the key turned to the ON position. (ecu powered, lights in dash light up, etc) Well atleast not enough to light up a little test light. (pic of test light included )

So did I just discover my problem or is that normal ??

[s13_chris]

Also, don't know if this has anything to do with it BUT, my Apexi SAFC is reading 0% AFL. So is that causing it to go haywire? My SAFC has f***ed with my MAF before. Like it lost power and would completely mirror MAF problems. I'm going to look furthur into this also.

[s13_chris]

Well my SAFC is not getting any throttle or maf signal wire power. I'm so f***ing confused. Opened up the SAFC and all wires are intact. Running out of ideas.

Again: No Signal Wire volt readings. AKA, No power from signal wire. I got like .003 but I don't know if thats accurate. I have not tried to get a reading from the throttle one yet.

SAFC Is not reading AFL (through the maf) and is not recognizing any throttle.

I have no grounded the MAF like you said because I am unsure on the 100% way to do it.

[s13_chris]

HIIZZAAAAAAAH! Headway! I unplugged the 2 wires coming from the SAFC that basically splits the MAF connection and reconnected the MAF wire. HIZAAAH! success. It revs very happily and sounded like it missed me SO, now what? I am going to check my SAFC connections somemore.