Idling Very Strange And Sometimes Stalling

[HYBRID VL]

ok noticed this with my car when i 1st bought it a few years ago would idle between 1000-400rpm boucing while stationary like at lights in driveway morning warmup stuff like that now only yesterday my car was idling whilei was in the garage and it stalled i was like hmmm strange so i went and started it back up and it would not start so i poped the bonnet and checked the AFM plug and just had a look and then qwent back cranked it and it started let it run abit then it died again then i started it and it ran and then died again.

didnt know hat the prob was as i have never had it just die like that so i gave it an oil change and filter i hardly drive the car i have had the car for 4 or so years bought it on 99k and its up to 108ks.

Now im just wondering what the problem might be im thinking maybe this idling problem is all connected with the stalling i have a Vid of the idling but it didnt stall i just have to reduce the vid size from 850mb so i can upload it to youtube and link here.

My thoughts were AFM though i was told unplug it and if the car dies it isnt your AFM so tried that and the car died so thats one thing if its true.

AIC valve maybe dirty so i might pull that off and clean it this weekend coming.

also i thought maybe Air filter dirty or maybe fuel filter so ill change all them this weekend aswell.

see how things go any thoughts much appreciated.

[dontyellpl0x]

Any mods on the car?

[Got a Pulsar]

Have you cleaned the AFM with CRC? Plumback Bov or Atmo? Stock ECU? Checked for split vacuum hoses?

[HYBRID VL]

car is pretty much standard apart from a Pod filter and a cat back 3 inch nismo exhaust it runs standard boost and ECU hasnt been modified at all standard BOV aswell no i havnet cleaned the AFM yet its on my to do list for this weekend do i read to use brake caliper cleaner for that.

[Got a Pulsar]

Use Crc MAF ckeaner or contact cleaner.

[Dose Pipe Sutututu]

Unplug your O2 sensor and see if the problem goes away.. a dead/faulty O2 would do that as the ECU dumps in waaayy too much fuel thinking it's leaning out when idling

[HYBRID VL]

But it dont seem to be running rich at all.

infact everything seems perfect just this damn idle problem Vid will hopfully be up shortly.

[Wongy]

My car had similar problems, it stalled sometimes during idle and then I went to start it and wouldnt crank over, and sometimes when im driving it loses power and the car is trying to cutt off and then when I get to traffic light it stalls, and I had to press lock and unlock again before I could crank, not sure if same problem as you but I had one of these in the glovebox.

Took that out and problem is gone. Hopefully this helps but sorry if it doesnt, hope you find the solution soon mate

[Dose Pipe Sutututu]

But it dont seem to be running rich at all.

infact everything seems perfect just this damn idle problem Vid will hopfully be up shortly.

just try unplug your O2, it's a 3 sec job to do

[HYBRID VL]

soz for sidewayz action

Edited September 23, 2013 by HYBRID VL

[HYBRID VL]

direct link dunno what i did there soz for sidewayz action.

so what am i looking for when i unplug the o2 sensor?

Edited September 23, 2013 by HYBRID VL

[Got a Pulsar]

I honestly thought sidewayz action was gonna be you tromping it round a corner.

That's pretty weird. I'd say when you unplug the O2 you are looking for less of that weirdness and more normality.

With the SAFC2 above, they intercept the Airflow Meter. Perhaps the Airflow Meter is your problem.

Try unplugging the AFM and start it. It won't rev over 2500rpm but should idle. If it's smooth, you found the problem.

Could be DIRTY or contacts could need a resoldering.

[Dose Pipe Sutututu]

direct link dunno what i did there soz for sidewayz action.

so what am i looking for when i unplug the o2 sensor?

your idle might go back to normal

[HYBRID VL]

ok imma go try the o2 sensor unplug and yer i thought maybe AFM was dirty so il clean that this weekend6

[HYBRID VL]

Ok just started my car with the AFM and O2s connected let it run for abit and it started to do a lil idle glitch and then ran good then stalled.

Took the AFM plug out started it ran good started idle glitch didnt stall.

Plugged back in the AFM unplug the O2s and it ran like 600rpm really roughish idle but didnt stall kinda smelt like it was running rich at that point.

Plugged all back in started it and it ran just like before.

Im starting to think maybe the AIC valve alotta people at work have been saying its a common problem with alot of older 90's cars that have built up crap inside the valve and it limits or stops functioning and was told to pull it off and clean it cant hurt to do AFM and AICV at the same time right..

[Got a Pulsar]

DIY Aac Cleaning ---->> http://www.skylinesaustralia.com/forums/topic/110431-diy-aac-valve-cleaning-idle-reset/?hl=%20aac

Give it a crack!

[HYBRID VL]

yer was reading this thread last night gunna do it

[HYBRID VL]

Ok did all the above...about 2 weeks ago started my car last night let it idle NP...

Today went out started it was idling died...started idle die....start idle die..thought id start it and acelerate see if it keeps the revs up and it was like i wasnt even acelerating..so im thinking its more to do with either ignition maybe plugs,coils,Fuel pump or Fuel PSI regulator but i doubt it or AFM still now wen it was dieing and i was stuck halfway down the driveway i jumped out popped it bonnet and unplugged my AFm and then plugged it back in and cranked it started and idled NP...drove it back up the driveway..let t idle NP.

i was reading that if i unplug the AFM and it keeps running then the AFm is stuffed If it dies its working well i unpluged it and it died on me plugged it back in and started NP and ran well.

Maybe ther plug is stuffed or a connection or maybe it is still abit dirty the only other things i can think off is fuel or plugs as honestly im lucky to drive my car once a month i do let it idle in the driveway a few times each week.

Thats due to my truck being my transport all day and wifes subie when im home.

what you guys think AFM ?

i was also thinking about check the ACV again aswell after i cleaned it maybe even just by a new 1.

[Dose Pipe Sutututu]

start the car, unplug your TPS connector(s)

see where the idle sits, should be flat at 650rpm.. if not.. adjust the idle screw (in for revs down, out for revs up) then plug back the tps connector(s)

[HYBRID VL]

nah i dont think it has anything to do with the TPS as it idle ok its just it dies it dont drop idle then die it just dies

BUT..i will check that as it will be 1 more thing off my list.

Edited October 10, 2013 by HYBRID VL