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[P6UL K]

Yes, yes I know it's been covered a million times before!

I've recently bought Twiglets old Black DTi Estate off of him which came with a box of replacement vacuum solenoid parts, I've replaced the one by the N/S suspension turret and the two down on the O/S by the rad.

Now my actual question is, is there a specific solenoid that causes the actual problem of causing no boost? I have one solenoid left and a medium sized thing with a gear wheel on it? Where would that go?

I've also been replacing the vacuum tubing as I've gone along just in case the rubber joiners are split somewhere.

[VXL V6]

Have you checked the big rubber connector on the vacuum pump at the back of the block? Is the EGR working? What codes do you have?

[P6UL K]

Have you checked the big rubber connector on the vacuum pump at the back of the block? Is the EGR working? What codes do you have?

I'm new to this diesel malarkey so alas I haven't done much other than go on what James has told me... So no I haven't got any codes - but will get them over the weekend, when you say back of the block do you mean between the bulk head and the head it's self? I wasn't aware of this big rubber connecter but I'll check it - what does it look like? EGR?! Oh dear! Where's that? 

[VXL V6]

The vac pump is on the back of the head, driven by the cam, you can see it if you look from the O/S, there's a big rubber connector connected to this.

EGR easy to spot if you take the black ecotec cover off (though not necessary), held on with two Torx bolts.

[P6UL K]

Ok thanks 

With regard to the rubber connector, am I just checking for splits etc...? What about the EGR? What am I looking for with that? 

[VXL V6]

Ok thanks 

With regard to the rubber connector, am I just checking for splits etc...? What about the EGR? What am I looking for with that? 

Usually it falls apart when you touch it.

Remove it and check it can hold a vacuum.

And have you checked the 90 degree joint on the back of the turbo actuator?

[Marks DTM Calib]

If the EGR is stuck open then the exhaust gas velocity drops and any boost from the turbo tends to dissipate to the exhaust.

The result is no go and often black smoke

[P6UL K]

Ok thanks 

With regard to the rubber connector, am I just checking for splits etc...? What about the EGR? What am I looking for with that? 

Usually it falls apart when you touch it.

Remove it and check it can hold a vacuum.

And have you checked the 90 degree joint on the back of the turbo actuator?

Okay-doke I'll check that rubber elbow when I'm over my garage on Sunday, also the vacuum pipe is new to the turbo actuator - replaced it with new pipe to be sure.

[P6UL K]

If the EGR is stuck open then the exhaust gas velocity drops and any boost from the turbo tends to dissipate to the exhaust.

The result is no go and often black smoke

I'll whip that off on Sunday too and give it a good clean with some carb cleaner 

[dazza88]

Keeps your eyes open I could be scrapping my 2.2 dti if your interested just found myself a nice 3.2 elite what ive always wanted ;-).

[P6UL K]

If the EGR is stuck open then the exhaust gas velocity drops and any boost from the turbo tends to dissipate to the exhaust.

The result is no go and often black smoke

I'll whip that off on Sunday too and give it a good clean with some carb cleaner 

Never made it over there today because of the weather so i'm heading over there in the morning.

[P6UL K]

Ok thanks 

With regard to the rubber connector, am I just checking for splits etc...? What about the EGR? What am I looking for with that? 

Usually it falls apart when you touch it.

Remove it and check it can hold a vacuum.

And have you checked the 90 degree joint on the back of the turbo actuator?

Right I've checked the EGR, removed it and have it a good clean up with carb cleaner... Seems to be moving in and out ok with some sprung force to it.

Have also checked vacuum, there is vacuum there but not what I'd call a strong vacuum...

[P6UL K]

Out if my box of bits supplied by someone on here who I can't recall is...



Any hints on where these go?

[VXL V6]

Top dunno

Middle boost pressure senor

Bottom vac pump

[P6UL K]

Think i might change the vac pump too - Just in case...

Also, do you get the feeling that people are fed up helping issues with the 2.2DTi...?