Unplugged Battery, Car Now Stalls On Startup

[Touge Kyousou]

To find pcv...

at the front of your plenum there is a brass coloured fitting that comes out then turns 90degrees left (as you're standing looking at the engine/bay), it will have a section of 9mm hosing that is attached to it - it goes left, takes a bend downwards and then plugs into the pcv valve sticking out of the cam cover of the left bank (driver side). Need a largish socket to remove the pcv.

[ajc300gt]

Did you have the battery unplugged?

If so, give it a few days of regular driving and it will go away.

Nope, still not fixed after a month of driving, so xscape237, it went away after a while for you did it??

[xscape237]

Nope, still not fixed after a month of driving, so xscape237, it went away after a while for you did it??

Yes.

I've had the battery unplugged multiple times now and its always the same story. In fact the most recent was at the mechanic just last week. This time it went away after only 2 days of driving. The first time it took longer than a week.

[andy65b]

Have you cleaned your throttle body?

The VQ motors with their drive by wire throttles do not have an idle bypass valve. So if carbon builds up around the throttle butterfly it can block the small gap at idle that is left for air to flow past the throttle butterfly.

It sounds like you have enough airflow past the butterfly when cold (more throttle opening with auto choke) but when it is hot the butterfly is opening less and not allowing enough air past the butterfly.

I would try cleaning the throttle body with carby cleaner and be very careful of moving the butterfly. I have heard of them loosing their calibration by moving them. I did not have this problem when I cleaned mine.

And the PCV is a Major service item and should be changed every 80'000km. It is only $50 from Nissan so not a big outlay for enjoyable motoring.

Cheers

Andy

[superspit]

Have you cleaned your throttle body?

The VQ motors with their drive by wire throttles do not have an idle bypass valve. So if carbon builds up around the throttle butterfly it can block the small gap at idle that is left for air to flow past the throttle butterfly.

It sounds like you have enough airflow past the butterfly when cold (more throttle opening with auto choke) but when it is hot the butterfly is opening less and not allowing enough air past the butterfly.

I would try cleaning the throttle body with carby cleaner and be very careful of moving the butterfly. I have heard of them loosing their calibration by moving them. I did not have this problem when I cleaned mine.

And the PCV is a Major service item and should be changed every 80'000km. It is only $50 from Nissan so not a big outlay for enjoyable motoring.

Cheers

Andy

Perfect...that's exactly what my mechanic did during a 'major service' to solve the issue of 'stall when warm start-up'.....there was much carbon type crap to be found!

Clean that induction system!...it's vital. (oh, and swing over to using BP Ultimate, if you can).

My battery has been allowed to go flat many times since repairs (I don't drive the Line very much), and the idle is now the least of her problems!!..lol.