New problem on our 1.6SR. Done 120k miles. Well serviced. Have had all the cracked air pipes new, cleaned the MAF, had new coil pack, new plug leads, new plugs and it still does the eratis idle thing , but that is not the real problem. Twice now it has burnt out either 3rd or 4th cyl, plugs or leads.....starts running like a tractor with smoke everywhere. VW and another specialist have checked compression and all good. Last fix was the new coil pack, another set of leads and another set of plugs!! Any ideas? ECU problem?? The last fix lasted about 100 miles.