Delayed acceleration

[Giles07]

Hi guys, got a problem that I can't figure out. To

Engine is responsive and revs good on the spot but if I accelerate a little then disengage clutch and accelerator (so revs come down to idle) then push the accelerator again, the engine is delayed by about half a second to 1 second causing it to be a real pain to drive in traffic. But also on the odd occasion the van drives flawless and doesn't delay. Fault has been getting progressively worse for a year or so and my local mechanic couldn't figure it out so any info I can gather would be greatly appreciated. Any ideas?

P.s: It's worth noting that a p0490 egr fault came on for about a week a while ago but went off on its own and hasn't returned, no other codes.

07 TDCI 1.8 lwb 110ps

[g-man]

110s do seem to get a bit of lag.......try blanking the egr

[Giles07]

I notice the slight lag on the acceleration but this problem is much worse, it only occurs when I'm braking to a roundabout/junction or as I mentioned above. I timed the delay to 2 seconds till the revs started to rise and then if I take my foot off the accelerator the revs continue to raise for a further second. I can't imagine blanking the egr will help solve the issue?