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View Full Version : wideband broken?

mig_L05
08-27-2010, 11:28 AM
here is a youtube vid of my AEM doing weird things. i was just curious that maybe it was broken or something?? i remember once i left it out and it sort of got rained on.......

YouTube - sr20det Air Fuel Ratio going insane! (http://www.youtube.com/watch?v=HT6n0BfoEaE)
mig_L05
08-27-2010, 11:07 PM
:wackit: midnight bump
R33E8
08-28-2010, 12:11 AM
the wideband seems fine.. something else might be wrong though...
mig_L05
08-28-2010, 12:41 AM
ya i figured. do you think it needs to be tuned?
R33E8
08-28-2010, 01:10 AM
i guess that's possible.. seems like there might be a more mechanical issue though like a loose hose or something...
Z33dori
08-28-2010, 01:48 AM
my car does the say thing just about..

above 1k its normal like 15.6 or so diving down to maybe 13.8 all in that range. then it will dive below 1k rpm and the a/f go way out to like 17.8 and then off teh chart....

cant really figure it out, i restabed my cas several times nothing changed, change fuel filter, and type of gas. Wish i had a consult tool :(
mig_L05
08-28-2010, 08:32 AM
my car does the say thing just about..

above 1k its normal like 15.6 or so diving down to maybe 13.8 all in that range. then it will dive below 1k rpm and the a/f go way out to like 17.8 and then off teh chart....

cant really figure it out, i restabed my cas several times nothing changed, change fuel filter, and type of gas. Wish i had a consult tool :(


did you try putting in octane booster? i know i tried to do that once before and it helped a little bit. what kind of setup do you have??
mig_L05
08-28-2010, 08:33 AM
i guess that's possible.. seems like there might be a more mechanical issue though like a loose hose or something...


i guess its back to the drawing board again. man only because i love my car, and i want it to be immaculate.
tercel drifter
08-28-2010, 06:43 PM
i don't see any problems, are you talking about the fluctionation in a/r at idle?
fliprayzin240sx
08-28-2010, 07:50 PM
I'm pretty sure its supposed to do that. Engine goes lean when you lift off the throttle...
mig_L05
08-29-2010, 01:22 AM
I'm pretty sure its supposed to do that. Engine goes lean when you lift off the throttle...


so why is my car almost stalling? i tried to get help from a local shop and all they told me to do was adjust the idle screw to it idles at 1k rpm. but i heard that normal idle is supposed to be 750 ish? are they busting my balls?

whats normal AFR at normal operating temp idle?
fliprayzin240sx
08-29-2010, 07:37 AM
Are you running an open air BOV? That could be the reason why the car is bogging/stalling.
mig_L05
08-29-2010, 12:08 PM
Are you running an open air BOV? That could be the reason why the car is bogging/stalling.


ya its not "recirculated", so is that bad for my engine?

i have the Apexi Power FC L-Jetro version that im going to install when i also put in my 740cc injectors. would a good tune eliminate this problem? or does it HAVE to be vented back in the intake?
Z33dori
08-29-2010, 12:14 PM
did you try putting in octane booster? i know i tried to do that once before and it helped a little bit. what kind of setup do you have??


not yet, i picked up some injector cleaner, but i havent had a chance to fill up the gas jug and fill up the car to try it out.

setup
s15 turbo
greddy FMIC
megan mani
stock inj
stock cams
stock intake
no bov
mig_L05
08-30-2010, 03:44 PM
not yet, i picked up some injector cleaner, but i havent had a chance to fill up the gas jug and fill up the car to try it out.

setup
s15 turbo
greddy FMIC
megan mani
stock inj
stock cams
stock intake
no bov

no BOV? well anyways man i put some octane booster in my whip and it did make a difference. i bought the lucas one though and it was not street legal. didnt know at the time of purchase.

maybe bad gas?
Z33dori
08-30-2010, 05:00 PM
no BOV? well anyways man i put some octane booster in my whip and it did make a difference. i bought the lucas one though and it was not street legal. didnt know at the time of purchase.

maybe bad gas?


yea thats what im pretty sure it is. I got this car off a guy back in nov, and he had bought it not running and we pumped lil gas out and it was pitch black, then dumped in a can of race gas, which i forgot had klotz 2 stroke oil in, so im sure that helped. Right now just slowly trying to run it all out of the car cause i cant drive it yet. Since then i've put about 3-4 gallons of fresh 93 in it, but its slowly getting better

so hopefully i can finally empty it out and fill it up with some new gas