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