Turbo Charger Electrovalve

[stephenhoughton]

Hello,

i recently posted about my C8. It was idling roughly, cutting out, mpg only 30 for a 2.0 hdi.

I took it to the dealers, they diagnosed faulty injectors.

They could not get the injectors out so they changed the engine and fitted 4 new injectors.

I picked the car up at the weekend.

God it's still the same, the only difference is that now it pumps out white smoke like its going out of fashion, still very rough running, still stalling.

Took it back to the dealer, technician thought it was ok. Obviously we disagreed. He put the rough idle down to fact i had the air con on. He turned it off, still no change in the rough idle, engine surging. He turned the air con on and the engine stopped. I left the car with him.

This has all taken 4 weeks so far, new engine, 4 new injectors and still got the same fault.

Garage rang today to tell me the car is ready to collect.

They found a loose wire on the turbo charger electrovalve, connected it securely and the car is supposedly now ok. i have not picked it up yet.

I was told by a friend that the rough idle was caused by the exhaust gas recycle valve.

Is the exhaust gas recycle valve ( egr ) another name for turbo charger electrovalve or are they different

I might have had a new engine and 4 new injectors fitted when all it needed was a loose wire connecting properly.

 

Garage had the car for a week, tested everything, found nothing, i picked it up on Friday last week.

On Monday the car had to be recovered to the garage. Engine revving itself, tons of black smoke this time.

Using the accelerator pedal made no difference to the engine, it was running itself.

Stopped the car started the engine again, still surging on its own, accelerator again did nothing, tried to drive off, lift clutch, engine stalled.

Started engine again, loads of black smoke, revving up to 2000 then stalled.

The garage are now certain it's the egr valve as when disconnected the engine is ok in their workshop.

Change the valve i said, garage reckon the valve is ok, it's now something telling the valve to open / close etc.

 

Every time i have taken the car to the garage they have connected it to their diagnostic box and according to them they have found no faults, unbelievable

I told them that i wanted a printout of the diagnostic test showing no faults on any components before i was prepared to pick the car up.

They have had it 3 days so far and are 'still working on it'

 

Help

[paul.h]

The egr valve is nothing to do with the turbo but lets exhaust gases back in to the engine to cool the combustion and reduce nitrogen oxides in the exhaust gases.

 

Possibilities for white smoke could include a water leak into the cylinders giving steam in the exhaust, a turbo problem (when we had one fail on a Saab it was surrounded by white smoke coming out of the exhaust).

 

It may be worth posting this on the C5 pages since this engine is also used there and that forum has more posters.