Hi. I have. 2007 A8 3.0 TDI. The engine is making a hunting noise when idle and when driving. Looking at the engine I can see a solenoid flicking on and off which is making the engine hunt. having done a bit of searching it looks like it’s linked to the EGR valve? Is there a way of testing what need to be replaced? There’s a plastic solenoid valve with a grey round cap on it. Not sure if this needs to be replaced or the solenoid itself? Or anything else?
Engine Hunting.. EGR valve?
in Audi A8 (D3) Forum
Posted
Hi. I have. 2007 A8 3.0 TDI. The engine is making a hunting noise when idle and when driving. Looking at the engine I can see a solenoid flicking on and off which is making the engine hunt. having done a bit of searching it looks like it’s linked to the EGR valve? Is there a way of testing what need to be replaced? There’s a plastic solenoid valve with a grey round cap on it. Not sure if this needs to be replaced or the solenoid itself? Or anything else?
just posted a short video to show the issue.
thanks
Nigel