A cautionary tale;!..
Quite somewhile ago I posted here re my vintage Audi A6 and an a rough idle problem.
From the start this would very rapidly start to "hunt" i.e. rev up to say 1500 and down and then up and down and so on.
Several part's were changed and checked to no avail, so I just decided to live with it as its an old motah and prolly not worth the cost of a main dealer looking at it..
Now theres a new garage just started up locally specialising in German cars and I thought I'd take it there just to see. One of the mech's said "Idle valve", has it been changed yet?, yes said I months ago now. Was it a gen Audi one asked he?, err dunno, sez I. Was it around 200 quid?, 'err No, more like 60 ish .. and off e-bay said the mech?, umm yes Said I.
Have you got the original one still?. Yes, never throw anything away me. OK says he, Heres what to do take the replacement one off and put the old one back on but first dump a can of carb cleaner in it to flush out all the crap that's prolly in there. If its still no go bring it back and we'll look further.
OK sez I, then he said that they had a skip full of poor quality Chinese and far eastern knock off parts over there, change them most days and then fit Gen German ones. Just done that BMW over there with a Gen BM alternator the replacement knock off unit was s**te..
So this afternoon did just what the man said and .. RESULT !!!
Its fine, ticks over right on the mark and runs that much better:)
A very Happy bunny.
Moral of the tale as above, be careful what you fit to your car;!!....