Hi Guys
Long shot but it's starting to annoy me. My diesel weasel (see sig) has had a small problem since it was new, and it's so intermittent making troubleshooting a right pain as it never seems to do it within range of an Audi mech!
Basically, maybe once a week or so, when I put my foot down when the engine is under load (so not at idle) I get a horrible tappetty noise, it sounds like a transit engine, and I lose power though not severely.
Now, it only seems to happen when the engine has fully warmed up, and it's a nice day, i.e ambient air temp is over about 18 degrees outside.
Any ideas? Car is under warranty but they've "had a look" and can't find anything wrong, of course