Yet Another Stalling Problem...

[Johnny Cash]

Heya all,

Same old problem. Drive around, then put it in neutral. Car drops to around 500rpm, then stalls.

I cleaned the AAC like nobody's business, and still no luck. I'm running an aftermarket BOV, but am

plumbing it back.

Visually inspected the AFM and it seems fine. Is there any way to tell if it is the cause of the problem?

If I can't fix it myself, I'll have to fork out big dollars to get everything inspected one step at a time.

I've heard rumours of an idle speed control solenoid, air regulator or throttle position sensor, but the details

on them were sketchy at best.

Please help me out,

Thanks,

Adrian.

[Johnny Cash]

Just found out that with the A/C on, it wont stall. So I'm writing it off to an rpm setting issue, and will turn up the revs on the old girl, see if that sorts it out.

Will post the results on here either way.

Thanks,

Adrian.

[Johnny Cash]

As an update, I cleaned the AAC, it's sparkling inside now. Put it all back

together without a drama, and it still stalls.

Other causes I've read about are as follows:

AFM dirty or oily

Fuel Pump earth wire

Fuel Filter clogged

Throttle Position Sensor needs adjusting

Crank Angle Sensor needs adjusting

I'm going to attack my AFM with carby cleaner tonight and see if that makes any difference. If it STILL stalls, I'll look into disconnecting the AAC plug, and check if that stabilized idle. If it does, I might not bother re-connecting it.

I'm also planning on changing fuel filter, and fitting iridium spark plugs.

Will eventually find the gremlin, then I'll let you all know

[Johnny Cash]

I've been told to check ECU diagnostic fault codes? Will give this a go.

Has anyone else had any luck doing this???

[blind_elk]

As an update, I cleaned the AAC, it's sparkling inside now. Put it all back

together without a drama, and it still stalls.

Other causes I've read about are as follows:

AFM dirty or oily

Fuel Pump earth wire

Fuel Filter clogged

Throttle Position Sensor needs adjusting

Crank Angle Sensor needs adjusting

I'm going to attack my AFM with carby cleaner tonight and see if that makes any difference. If it STILL stalls, I'll look into disconnecting the AAC plug, and check if that stabilized idle. If it does, I might not bother re-connecting it.

I'm also planning on changing fuel filter, and fitting iridium spark plugs.

Will eventually find the gremlin, then I'll let you all know

Did you adjust the idle speed using the screw in the base of the AAC (driver's side)?

Clogged fuel filter usually has the opposite effect - idles fine, won't accelerate.

[Johnny Cash]

Nope, didnt think I would need to. It's idling unevenly and RPM hunting, it's not a matter of it idling too low. Unless the low idle is causing it to rpm hunt???

[Johnny Cash]

Just took my car for a spin and had a thought:

I noticed that when the boost gauge reads -0.6 on idle, the revs are around 650-700rpm. However, after driving then clutching in, the boost gauge drops to around -0.8, then slowly comes back up to -0.6.

My question is - is this cause or effect?

Is the low boost gauge reading causing rpm fluctuation, or is rpm fluctuation causing varying boost level readings? Or are both of these effects of the same cause?

[MerlinTheHapyPig]

because it is fine when A/C is on, it will most likely be the AAC valve

I'll just dig up info on how to test the AAC valve and post in a sec...

[Johnny Cash]

Thanks pal. I took the AAC off the car and cleaned the sh*t out of it

with carby cleaner, got it looking real schmick. Then I put it back on and

hey presto - no difference...

I heard that disconnecting it can correct the problem, but then it runs a

certain rpm idle no matter if A/C is on or off. I would rather fix the

problem properly, if I can.

Thanks a bunch for your help.

[MerlinTheHapyPig]

if you disconnect aac valve, i think it will just stall like it's doing.

just because you cleaned it isn't gonna fix it if it's broke

gimme 2 secs, im just uploading the relevent sections of engine manual for you!

[Johnny Cash]

Okie dokie

I didn't mean take the AAC off (as that would obviously leave a giant gaping hole out the side of my inlet manifold).

What I meant was disconnecting the plug that goes to the AAC.

Edited March 16, 2006 by Johnny Cash

[MerlinTheHapyPig]

ok, here is procedure to check your AAC valve properly. you'll need a multimeter.

my guess is either voltage between pin 1 and ground will be wrong, or the resistance between pin 1 and pin 2 are wrong, if everything is fine start looking at other things.

(sorry about the large images...)

hope this helps

[Johnny Cash]

Well it certainly looks like a lot of words and fancy pictures. Pity I know nothing about this sort of stuff. If I can't fix it with a screwdriver and a hammer, then it's beyond me.

Multimeter? I wish!

[Johnny Cash]

Sounds like something I might have to get my bro to look into next time he comes down...

[JnJ]

i dunno if this will help but, since uve mentioned that ur running with an aftermarket bov, have u tried putting a different bov? or installing ur stock one back? coz some ppl had this problem and usually the bov had been leaking or something like that, hope to be in help

[Johnny Cash]

Nah it all works a treat now. I just cleaned the AAC and AFM.

I used carby cleaner for the AAC, and electrical contact cleaner for the AFM.

Purrs like a kitten, thank god. Let's just hope it stays that way.

Thanks for all your help, guys.

[Johnny Cash]

She almost stalled on me this morning, but she was cold, and I was running my BOV atmo, so they could be causing it. I'll tighten the sh*t out of the BOV when I go home for lunch, and see if that makes a difference.

If it only happens when its cold, I'll let it go. It's when it's warm that it concerns me. It's hard to get going in the morning, like its owner

[J_R32]

sorry for the stupid questain, but is the aac valve the little "black box" that sits on the inlet minifoldfacing the firewall? if not can u please point out to me where is and wat it looks like?

thank you

[MMM]

mine was doing the something similar the other day would drop down to say 500 then feels like it woudl stall but would then go back to idol, only when stationary and in neutral while drivin it was fine

any ideas?

[Johnny Cash]

Still happening to me - gonna live with it.

Could be a million things causing it, so I'm not going to guess.