Air Flow Meter

[Daboss]

Hey forum have a lil problem with my 95 gts-t and was seeeking the help of the forum to try and solve it? Ok here it is, was installing a z32 airflow meter into my car followed all the steps of the tutorial to a tee and when I went to fire it up it didnt start. So I changed the settings in the afc neo to 2 in 4 out still nothing. After trying to start it for a while i decided to put back in the old airflow meter and when i wired it up the air flow monitor on the neo went str8 to 100%. Tried to start it and nothing. Put the z32 back in and he same thing is happening with that as well the monitor reads 100% as soon as I put the ignition to on. When I play with the wires it drops and jumps back and forth but I can never get to remain on zero were it suppose to b. Now i cant even get my car started and wanted to kno if ne1 on the forum has any solutions for me. All help is appreciated. Thanks!!!

[GeeTR]

Please link to which tute your using. Sounds like an wiring issue and your feeding 5v straight into the loom side signal wire, hence showing 100%.

[Daboss]

Please link to which tute your using. Sounds like an wiring issue and your feeding 5v straight into the loom side signal wire, hence showing 100%.

http://www.skylinesaustralia.com/forums/Fi...html&hl=z32

Thats the tute I am using. I am wiring my car using the series 2 wiring tutorial. I have the three wires so I have to join wires three and four on the z32 and, well the rest is in the tutorial as I stated when i play with the wires it drops down and sometimes fluctuates up and down but for the most part it remains on 100% and the car doesnt start. So what do you suggest I switch the wires around cause I tried to put the standard afm back and the same thing happened as well. Afc neo reads 100% and car wont start and all the wires match up cause its the original afm.

[GeeTR]

http://www.skylinesaustralia.com/forums/Fi...html&hl=z32

...as I stated when i play with the wires it drops down and sometimes fluctuates up and down but for the most part it remains on 100% and the car doesnt start.

By play, do you mean wiggle around? If the output is fluctuating when your just moving the wires around, you must have a dodgy connection. Check the pins of the plug your using maybe? Sounds odd. Does the bender need to be told the type of AFM installed?

Did the car start before you swapped plugs over, as if it did, and now your have wired the STD AFM back in exactly the same fashion... you might have killed something.

EDIT: I notice power and signal are similar colors, red and orange with black trace. That would (i think) give 100% output if you accidentally mixed em up.

Edited May 29, 2008 by GeeTR

[Daboss]

By play, do you mean wiggle around? If the output is fluctuating when your just moving the wires around, you must have a dodgy connection. Check the pins of the plug your using maybe? Sounds odd. Does the bender need to be told the type of AFM installed?

Did the car start before you swapped plugs over, as if it did, and now your have wired the STD AFM back in exactly the same fashion... you might have killed something.

EDIT: I notice power and signal are similar colors, red and orange with black trace. That would (i think) give 100% output if you accidentally mixed em up.

Ok will definitely check wiring again and yes when i say play I mean wiggle around and it is the type of bender that you have to put the number in, its an afc neo.

[Daboss]

Ok I cleaned the afm and made sure all the wires match up, the afc neo now reads 0% for the afm monitoring feature it has and i got the car to start but it only turned over for like 2 seconds after holding the ignition on for like 4 to 5 seconds then it just died. I tried to get it to start again but it wont. Any other ideas I can try or of what's wrong? I should not have to lean the meter out in order to start the car`right?Thanks for the help so far guys.

Edited May 29, 2008 by Daboss

[Daboss]

Was a fluke its not fixed as soon as i turned the car over it started then the afm signal went str8 to 100% and it died. I wired and rewired and no matter what I do as soon as the all the wires are connected the signal jumps str8 to 100% and my car wont start. Does ne1 have a solution for me?

[Daboss]

So nobody has any ideas? Wow!!!!!Thanks for all the quick replies !!!!!!!

[Adriano]

So nobody has any ideas? Wow!!!!!Thanks for all the quick replies !!!!!!!

Its either a wiring problem, or a faulty AFM

[Daboss]

Ok after about an hour of troubleshooting this is what I came up with. I disconnected the airflow meter and the car started but as you kno ya can't drive around with it like that, so i disconnected the two wires for the afc neo that monitor and control the afm voltage. Now when I turn the car on and touch the signal wire ofI also used the afm to the signal monitor wire of the neo it reads 100% voltage thats with no motor running. Now with the car running as soon as I connect the signal wire(no neo connected) this is connecting the original wire back to the ecu the car dies. I tried it wih the z32 afm as well and the same thing, could this mean that point on the ecu is shorted? Cus i would refuse to believe that both afm are faulty and the original worked right before i tried to put in the z32. The car starts and everything so the ecu isnt totally fried just as soon as the afm is connected it cant start anymore or if I have it started it dies. Oh I forgot to mention that for testin purposes i used some spare wire that I had, just to make sure it wasn't anything wrong with the wiring running back to the ecu. So do you think that its that point on the ecu board itself thats been shorted?

[GeeTR]

"touching wires" while the cars electrical system is turned on? To be brutally honest, your AFM install attempt and testing procedure reads like chaos. I think you should start warming to the idea, that theres a distinct possibility uv killed the sensitive AD input on the ECU. I'd revert to stock AFM and test with a known good ECU.

[MBS206]

Flash the ECU for codes... I bet it gives an ID 107 error...

Seriously, it's your wiring.

How are you joining the wires? Twist and tape?

[Daboss]

"touching wires" while the cars electrical system is turned on? To be brutally honest, your AFM install attempt and testing procedure reads like chaos. I think you should start warming to the idea, that theres a distinct possibility uv killed the sensitive AD input on the ECU. I'd revert to stock AFM and test with a known good ECU.

Flash the ECU for codes... I bet it gives an ID 107 error...

Seriously, it's your wiring.

How are you joining the wires? Twist and tape?

Well at first i was crimping them but when it didnt work, as I didn't want to keep cutting the wires back I then started twisting and taping for trouble shooting only. The only wire I touched while the electrical system was on is the signal wire to the neo it wasnt even connected to the ecu as i disconnected the input wire from the neo to the ecu, before I cut the car on power and ground were always connected I only touched the signal wire to the monitoring wire of the neo and kept gettin 100%. When I checked the ecu error code I got 12 and thats it and that error code is for the airflow meter but no matter which airflow meter i connect the z32 or the original I get 100% voltage reading. Whats an error code 107 I don't know that one? So as you said I need to get another ecu and maybe airflow meter and test from there.

Edited June 1, 2008 by Daboss