Freelander 1 Enquiry about the vacuum Hose on IACV

Hi everyone,

I am ME living in south Korea.
Recently, I have a problem on my freelander V6 2004MY. The RPM is fluctuating little bit when I start the engine and the car is stopped after driving. I can't feel that situation when I drive the car though.

When I try to sort a problem today, I found that the vacuum hose indicated in yellow arrow in the picture inhalant the air when the engine is running and the hose is disconnect.
Is it normal or faulty? I'm not a 100% sure but I guess this hose is connected on the engine and there is a check valve (called pcv?) to prevent reverse air flow.
Could anyone let me know the function of this hose and whether the mine is faulty?

Thank you for your opinion in advance.

Best Regards,

That pipe is part of the air assisted injection system. If it's open to the atmosphere, the engine will likely stall. It needs to be connected to both inlet manifolds via a T piece.

Couple of photo's here for you from when I change my thermostat on my 190 V6 MGZT
There are three pipes that fit to the throttle body as you can see below






this goe's to the vis motor


They are all push collar type except for one which is a twist type




Black collar push on this one











This is the twist collar type








This is the one in your picture that are held in by a push collar




Throttle body removed


Here you can just make out where the pipe leads too which was left in situ when I did my thermostat by key hole, I am not referring to the rubber hose I ampoint at but below that..




You will need to trace and check the pipe backwards if you think it may be leaking.

Nodge68 said:

That pipe is part of the air assisted injection system. If it's open to the atmosphere, the engine will likely stall. It needs to be connected to both inlet manifolds via a T piece.

Click to expand...

Thank you Nodge68.
I need more investigation/study to understand what you've mentioned. I will check how does the engine react when I remove and plug the pipe.
Thanks again.

Arctic2,

Thank you for your explanation with detail pictures. I can see the partial route of pipes in the last two pictures. Still wondering where the destination of these pipes is and what the correct direction of airflow is.
Anyway, you gave me the good info. for the pipe.
I will try to have an advice from an expert (not for Freelander but he has a lot of experience) tomorrow.
Thank you so much.

The Freelander KV6 uses air assisted injectors. These were supposed to give better fuel mixing for better emissions. The pipe you have found to be broken is where the air to the injectors is fed. Filtered are comes out of the IACV then splits into 2 pipes, 1 for each bank of the inlet manifold. From the connection on the manifold, air is fed to each of the 6 injectors. So provided the pipe is sealed from the outside air between the IACV and manifolds, it will work as it should.