Crikey, wasn't expecting a reply so quickly, especially on a saturday night. You guys must live n breathe this stuff, I'm obviously in the right place Guests cannot see images in the messages. Please register to forum by clicking here to see images.
It's funny you should both mention the EGR valve actually. When I searched these forums a couple of weeks ago, my symptoms pointed me towards either a knackered fuel filter or a clogged EGR valve. Someone said both might as well be looked at so I fitted a new fuel filter and priced up a new egr valve.
The guy at the trade counter suggested I try this spray stuff to clean the egr valve out without having to take it off. Just remove the air filter and spray it in bursts while the engine's being revved. Maybe it didn't clean it as well as I'd hoped, if at all. Symptoms didn't disappear anyway.
Seems quite a straight forward job to take off and clean so I'll start there. Suppose I was just being lazy with that spray...
Cheers lads, I'll let you know how it goes.