Well first I'll say hello to anyone who does(or even doesn't) remember me, not been here for ages... but then the Quattro hasn't been running/used for longer than that either lol So after sorting out the fuel filter leaking and checking through various other things it still won't run correctly. With a boost(battery sits too long) it will start. But it idles roughly and is reluctant to rev, then will drop and die if you don't catch it. It's as if it's not running on all cylinders but not quite. Yeah I now what a **** explanation. Checked all plugs,leads,coils etc and it is getting spark and fuel. Oddly this started to happen just after a service, fuel filter change & cleaning of the breather system. So today I got the chance to start it up and have grope underneath.. So the right bank exhaust is getting hot all the way along as you'd expect. The left bank isn't as hot. The downpipe is getting pretty warm/hot, the cat is pretty cool, then the rear of the next piece gets warm but I supect this is because it's next to the 2-1 y-joint. So I'm thinking the cat is fubarred. Any thoughts on this one before I get too far into it? Any tips on best methods of removal? Unfortunately if it is the cat I've had a stainless exhaust fitted and they welded it to the cat, I can still remove that section but can't simply replace witha standard replacement. Hope you didn't all fall asleep reading through that. Next step I think is to sell the car on, and take off the nice wheels and sell them seperately.. unless it redeems itself pretty damn soon, it's been sat for 6 months. :-( Cheers.