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View Full Version : car running rich on idle (below 9.7:1 af;r and leaning past 19 on WOT) + AFM issue.


Teambadrun
06-30-2009, 12:22 PM
OK guys
massive issue
you probably wont believe what is happening
but my car runs without a AIRFLOW METER CONNECTED.

we tested the ECU its FINE. * on another car*

i changed my ECU loom twice ( what are the chances of both looms fucked?)
i changed AFM
injectors
injector o rings
fuel pump
fuel pressure reg is NOW changed and running stock base pressure ( installed tomei one) with gauge

changed CAS
changed coil packs
changed ignitors

im thinking its the damn loom still? but WTF??

I can literally disconnect the AIRFLOW meter completely and drive

ihave my zietronix wideband o2 kit on it and it is going past 9.70 on idle and as i accelerate the damn car leans instead of richeining.
so something is fucking up my afm and making it work backwards???

has ANYONE ever made a car run without afm plugged in???
does anyone know what this damn problem is??

im actually not running a knock sensor at the moment i bypassed it by using a 510ohm resistor but it also did this b4 bypassing the knock sensor

my diagnosis port also wont work now ( I HAVE IT WIRED INTO BOTH MY ECU LOOMS)

if anyone can shed some light that would be much appreciated
thanks
alex

slider2828
06-30-2009, 01:46 PM
Disconnecting the airflow and being able to drive is a little crazy... Anything other than ECU you running? SAFC? Bla bla bla? Its gotta meter that air some how unless you are running crazy rich..

yukon
06-30-2009, 06:11 PM
most people would check the malfunction codes in the computer. the maf goes into limp mode. have you checked your grounds? of course not. this is tech talk not a place for someone without a handle on the basics. next.

Teambadrun
06-30-2009, 10:08 PM
most people would check the malfunction codes in the computer. the maf goes into limp mode. have you checked your grounds? of course not. this is tech talk not a place for someone without a handle on the basics. next.

nissan consult says NO ERRORS.

Teambadrun
07-02-2009, 11:57 PM
found out that my ecu was in limp mode :D

all good now
just breaks down abit under load(boost)
should be spark plugs fouled after all that richness from before :D