Its an 04 engine Y20DTH

I have a customers Vectra with a P0400 error, scanner says it is EGR, have checked all hoses, cleaned all the pipes out, EGR motor seems to be working ok as do the solenoids. Cleaned all the pipes and vacuum checked them all.

Tested the airflow meter all voltages OK and the scope pattern seems perfect.

Basically the problem is the engine speed drops and there is no reponse from the accellerator pedal, stop the engine and it restarts and all is fine until it does it agan.

I have noticed that when standing still and slowly pushing the pedal that as the revs get to about 2400 that there seems to be hesitation and then it goes throught it and seems OK.

Any Ideas?

Thanks

Eric

If not what could this be, solenoid, vacuum pump or what?

Need to get this sorted tomorrow as customer is going to France in it at the weekend!!

Come on guys, help me out with this.

I'm not totally up to speed on these, but I have seen numerous posts where it has been recommended to swop the solenoids around, as I believe they are both the same. That should give you a comparison to work from.

It can't be the vacuum pump if it's reading 27''mercury, I guess you mean, and at the tee piece 12, then you have a leak, so I would imagine the solenoid leaking is your problem.

No doubt someone will be along later who knows for sure.

Cheers Chris

I could give up Stella, but I'm no quitter.  

The valves tend to flutter/click even when they are ok

Most times you have to bite the bullet and buy a new valve {very expensive and poor quality for your money], but before you splash out

Remove and clean the egr valve and the manifold where it attaches , they get very dirty and tend to block the part where the gas flows.

Check the egr valve travel with your mity vac and that the diaphrams not leaking

T into the supply pipe to the egr and check - normaly the valve gives slight egr at idle, more up to 1/4 throttle, then non when you put your throttle right down

After reading all the posts I find anywhere on this, I am still confused about what should be hapening with these parts, complicated more by what the parts are called at diferent times.

Can anyone clarify what does what?

My understanding is that the EGR is actually a motor operated electrically by the ECU, the two solenoids by the battery - one controls the actuator and through that a flap that opens and closes the flow of air from the connecting pipe from the intercooler, into the manifold and engine - not too sure what this flap is for, any Ideas? This flap flutters and when the problem with lack of throttle occurs this is closed

cant remember what the oter one does.

Can anyone help with how this all works?

I have removed the EGR motor, cleaned all the muck from around the valve portion and inside the manifold.

Which part is it that I should be focusing on, the EGR Motor/Valve connected to the manifold or the vacuum solenoids, by the battery?

http://en.wikipedia.org/wiki/Exhaust_gas_recirculation

I could give up Stella, but I'm no quitter.  

Any Ideas?

a new one from what i can remember was bout £80 from vauxhall dealer

and i never saw the car again with that problem.

DAPPER!!!!

I have seen lots of other posts on other forums that say it is always vacuum leaks, solenoids or MAF sensor that causes this error, does not make sense to me, any comments on this?

Thanks for all the help so far

Any ideas on where I can get info on this particular system and under what conditions all the solenoids opperate etc?