What Is This Part For?

[zakmuh]

Hi,

I have this solenoid valve on my 2003 Sorento D4CB engine and it looks like it should have a hose connected to it, but it's missing. In Kia diagram (21) it shows as 'Differential Chamber Assy'. It looks similar to the EGR valve.

What is the purpose of this part?



Cheers

[zakmuh]

I'm going to remove this unit this weekend and share some pics.

One thing though, when I pull that lever, it cut off the engine. Does that tell anything?

[zakmuh]

As you can see, the EGR valve (far end) and the manifold are clogged up. I need to clean all these, including the intercool and the hoses.

This manifold unit is different to most of the units fitted on UK models. So I'm struggling to find a diagram/pic from someone....

[zakmuh]

Ta

Why exhaust gas is fed into the engine through the EGR valve, may I know please?

[zakmuh]

EGR feeds exhaust air which dont burn inside the combustion chamber, but it cools down the mixture to avoid nitric oxide forming.

So from what you're saying and what it is in my engine, the fresh air is fed all the time but EGR valve kicks in at certain pressure, like when speeding..

[zakmuh]

iridebikes said:

Could well be a flap to stop the engine running on if a fault in the turbo occurs (dieseling)

Yeah that makes sense, but I couldn't find any disconnected/missing hose in any other places in the engine room

[zakmuh]

SHutchinson said:

It isn't.

I just had a look and there is a flap inside and when I push that rod towards the engine, obviously that flap closes and then engine cuts off, which means...if that valve had a hose connected and vacuum activate, it will shut the engine down.

[zakmuh]

tapkaJohnD said:

Does the car have cruise control?
If so, I think this is the throttle for that. There's a diaphragm inside the container hat should be conneted to the intake manifold to sense the vacuum.

J

Yes, the car has cruise control option but it's not working at the moment due to faulty speedometer speed sensor.

I can't quite understand how this would relate to cruise control though

[zakmuh]

Thanks

As it's drive-by-wire (DBW) system, CC is controlled electronically. It's a known problem for this model and it needs is replacing the speed sensor at the back of the transfer case

http://www.underhoodservice.com/tech-tip-kia-inter...

[zakmuh]

Thanks for your reply.

Yeah, it's a throttle flap kinda thing, shown below, but I spend most of yesterday trying to find missing hose connection for it, nothing is there. All the vacuum hoses are connecting something. I tried online as well and there is nothing I can find related to this part.

If it's THE throttle flap, then it should be in closed position when engine is off then it opens according the acceleration. As nothing wrong with my engine or driving and acceleration working all fine, I think I should leave it as it is?

[zakmuh]

Bobley said:

It is a throttle of sorts but it isn't involved in controlling the power output of the engine. In normal operation it would only close in order to pull exhaust gas in. The vacuum hose which activates it would be clumped together with all the hoses running from the brake vacuum pump to the servo and also to the wastegate/VCT diaphragm. It could be a tiny tee piece and it looks like you engine has had it's EGR system disabled so whoever did it probably threw the control solenoid away too so all which remains may be a pair of wires and plug coiled up somewhere?

I should agree with you Bob cos, the inlet manifold is les clogged compared to the EGR unit to the valve. It must be disabled.

In the pic below, yellow arrowed pipe is closed with a metal cap at the back of the engine. I think that's the one supposed to be connected to the unit? The other pipe is connected to EGR...