[apsel]

In the safety recall thread I was discussing how my car had started to stutter (or falter) sometimes at low revs. There was some debate that this was due to a blocked sensor pipe. However I have used an ELM interface and software to capture the performance of the EGR valve and I thinks it shows I am about to need another new valve (hence moved to this thread).

IF you look at the attached which shows the EGR demand versus EGR error (which I guess is calculated in the EMU) you can see the value is rather sluggish to response to increasing demand for the EGR valve and extremely slow to decreasing demand sometimes causing the error rate to spike dramatically. IT is during some of these spikes that the car stutters I guess due to the valve being open.

I am not sure how far this is off normal operation but am expecting the warning light to come on pretty soon as this is getting worse!