Right The first thing to let you all know is there are dump valves on the car and i dont have the original EGRs so refitting is not possible.....

 

When the car starts it sometimes sits about 1500 RPM other times its lower. (Cold weather or Hot) The tickover seems a little irratic. if you lightly blip the throttle it sometimes sits high for a sec then settles or drops low then settles.

 

When you brake from hard it stalls. I have tightened up the dumpvalves and it helps on the deceleration stalling but is still awful.

 

If its stationary and you give it a 6k rev it also shows the symptoms of trying or actually stalling.

 

I have checked the TPS? I think that what i checked on the side of the Throttle body using the checks and this is fine.

 

I read that cleaning up the filter on the AAC can fix things? Could replacing the IAA be the issue? If so how do i know its faulty? any tests?

 

Finally could it be a vaccum leak.

 

Any other tips would be great. Thanks...

check the connection at the AAC valve,its a yellow plug at the pass rear of the plenum.if the pins are corroded the ecu has no control over the engines tickover.