If you disconnect the EGR valve the ECU will think it's faulty and throw up a fault.

 

Cheers Noel, will this cause it to go into Limp mode??
Also would you suggest a new one or blanking it off?
Thank

 

What makes you think the EGR valve is faulty?

 

Cheapest guess?? Lol
What do you think it is?
Symptoms as follows...
Throwing out black smoke (only under acceleration) (I'm aware diesels do but more than it should )
And also when I put my foot down (only sometimes ) the turbo won't always kick in but if I let go of accelerator and put it down again it kicks in??? Turbo is fine a it was only replaced 12 months ago.. Still kicks in just hesitant (sometimes) cleaned egr... Black smoke had reduces slightly and ran forte through it
....
And thoughts welcome what could I try??? Cheers
Still getting good mpg ( between 45-52 ) dependant on conditions

 

Black smoke is either a sign ot too much fuel or too little air - in your case it would seem to be the latter.

Have you checked the inlet system and intercooler for leaks?

Could be a lazy turbo actuator solenoid or faulty turbo pressure sensor or even a duff MAF sensor.

Are there evr any warning lights on the dash?

 

Hi mate,
No warning lights on dash whatsoever... All lights come on and go off when started
Any ideas

 

If you connect the breather pipe to a catch can and block or plug other pipe then you can remove egr valve and blank. ecu will not know any different and car will run fine.