Hello, I think this is my first post here, but I hope someone with a wealth of experience could possibly help solve my problem...

I got a 2000 plate 1.6 A3 with an AEH type engine back in January.
Its was pretty ill, had a huge misfire and what looked to be a knackered head gasket.
So I did head gasket, cam belt, water pump etc...
I also did plugs and leads in the service. Replaced everything with genuine parts.

After re-timing the engine etc, the car ran ok-ish. It was still quite lumpy and seemed to labour a little too hard for the amount of power it was outputting. It seems to struggle at low RPM in 2nd.

However, this problem is starting to get worse again.
The idle seems quite lumpy and also sounds to misfire every so often.

I wonder if anyone could possibly help me to diagnose this problem.

Many thanks,
Simon