vn stalling at idle

[vnv6 wagon]

hi guys i tried to post this thread and no one wrote on it so im trying again my vn keeps stalling at roundabouts,lights and just when im gearing down to stop any ideas what could be wrong???

[sik_dose]

what else does it do? can it idle at all? do you service it? have you replaced anything on it latly?

[mischa]

I think your describing the same thing i got, turning aircon on makes it worse? Ive put it down to the IAC but everytime im near the wreckers i forget i need to get one

[strgas]

sounds like base idle is to low , common on series 1 vn's

[vnv6 wagon]

yeh i do service it it does idle but wen i gear down to a roundabout it will stall sometimes when i try to start it again it wont start and all i can smell is fuel although not the fuel pump it seems to be working fine??? weird huh

and to mischa that does make sence but i took all my aircon out because it was stuffed and was draining my battery.

[vnv6 wagon]

oh and i have put some new stuff on lately ... i did a heart transplant and put a vr series 2 motor in it about 200 km's ago

[jamiepasslow]

hi guys i tried to post this thread and no one wrote on it so im trying again my vn keeps stalling at roundabouts,lights and just when im gearing down to stop any ideas what could be wrong???

Sounds like the best start is to clean the carbon out of the throttle body & where the throttle butterfly sits and adjust the base idle.

[COTTER]

does it do it when your braking

[vnv6 wagon]

yeh it does actueally do it when im braking and also how do i adjust the base idle i thoought it was all done by computer.

[mischa]

My base idle is fine, and yeah it is done by computer hence me thinking the IAC is stuffed.

Cause sometimes when i do come to the stop I see the revs drop to 500 then slowly go back up as if some sort of value was being ajusted Thats when it dosent stall.

Dose it like stalling more when you turn into a driveway with your foot on the clutch? The extra load of the PS dose that.

[vnv6 wagon]

yeh it loves it it wont stall in gear but when i put the clutch in it stalls and some times it doesnt quite stall it drops then goes back up like u say. what do u mean by an extra load of p.s ??? power steering?

[mischa]

Yeah power steering, puts more load on the engine when you turn at slower speed vs higher speed. Just think back to the non power steering days when you had to park the car

If i ever remember to get another IAC valve ill let you know

[88GreenVN]

The stalling issues with VN's are so common - they all do it at some point because of the age of the car. I'd also check the ECU, CAS, DFI & coils if the IAC valve fails to fix it.

[jamiepasslow]

yeh it does actueally do it when im braking and also how do i adjust the base idle i thoought it was all done by computer.

The cars usually cut out when slowing down or stopping because the carbon is blocking up the throttle opening and the IAC valve cannot supply enough air to keep the car running. This is why we need to make sure that the throttle body is clean and set a base idle.

You can clean the throttle body and adjust the base idle quite easily. Follow the below steps

1. start the car and get it to normal running temperature.
2. switch off the car and remove the intake pipe going to the throttle body.
3. hold the throttle open and clean the carbon from the throttle body with petrol on a rag or carby cleaner.
4. start the car and let it idle.
5. block off the hole on the throttle body going to the IAC valve (on the right as you are looking at it).
6. Adjust the throttle stop screw so that the engine is just ticking over.(Usually about 450 - 500 rpm).
7. take your finger off the IAC valve port and let the car come back to a normal idle. You can if you wish spray carby clean into the IAC valve port to give it a quick clean but it is usually not required.
8. refit your intake pipe.

That's it. Now the rpm you set the base idle at is the minimum rpm that the engine will get to. Do this before you spend a lot of time diagnosing or replacing parts as it will usually fix the issue.

Hope it helps

[wortus]

I don't think spraying carby cleaner into the IAC is a good idea. I've read that the solvent can bugger the insulation on the motor insode it.
If it's that blocked up it's stalling I think the best solution is to remove the throttle body from the car then remove the IAC and throttle position sensor and clean it off the car. If the IAC itself is blocked up clean it gently with a bit of wire and if you need to spray use WD40.
To test the IAC I think you connect it back to the wiring and turn the ignition on and the valve shoudl go up and down a few times.
I'd be buying a new one not a 2nd hand one if it needs to be replaced.

[vnv6 wagon]

ok i have removed the throttle body from my car and have cleaned extremely well however its still doing it its so i bought a new iac sensor and its still doing it any other ideas guys??

cheers

[h0Ld3n`VN]

i have the same problem to sometimes im scared that my car will stall before i get to stop at a traffic light
i did all that above steps awhile back even changing motors didnt help :S. its possibly a vacuum leak changing the hose's/new throttle gaskets might help

[h0Ld3n`VN]

ok i went outside n hour ago just to check for vacuum leaks etc
n i found that one vac line was damaged (hidden) u had to kinda bend it to see it
so i changed all the lines
idles so much better smoother not sounding like it wants to stall!
but not sure how it drives yet

[purrVN]

yeh i do service it it does idle but wen i gear down to a roundabout it will stall sometimes when i try to start it again it wont start and all i can smell is fuel although not the fuel pump it seems to be working fine??? weird huh

and to mischa that does make sence but i took all my aircon out because it was stuffed and was draining my battery.

all you can smell is fuel you say? have you checked for a fuel leak? possibly from the fuel pressure regulator for the lines onto it... i dunno if this would be causing you're issue though but it wouldn't be helping