Polo 9N3 1.4 FSI Sport keeps stalling !

[Norbreck21a]

Hi Guys,

My wife has a 2006 Polo 1.4 FSI Sport which is now 4 years old.

Anyway, she's had it from new, and although 4 years old, it's only done 25,000 miles. It's recently developed a really annoying habit of everytime you come to a standstill and dip the clutch (say for instance at a set of lights), the engine revs drop too far and it cuts out. It will re-start immediately, but again, without assistance from the throttle pedal, it will die again straight away. When it's moving, it works like a dream, smooth, pulls strongly right through the rev range. It's just this bloody stalling issue ! The problem seems to come and go. It can be fine for a few weeks, then like today, just started acting up again. It stalled 8 times in a ½ mile section today in slow moving traffic.

Unfortunately my Ross Tech VCDS cable is only for CAN based cars (like my MK5 Golf), so I can't see if there are any fault codes showing.

I've done a little reading, and it seems that the throttle bodies are prone to coking up with carbon deposits and this apparently causes issues with the idle speed control system ? A few people have reported stripping the throttle bodies and cleaning them, then doing a Throttle body re-set in VCDS (which I obviously can't do) solves the problem ?

Does any of the above sound familar, and does the above suggestion sound plausible. Don't really want to go to a stealer unless I really have to as the car is now out of warranty, and wil no doubt be raped !

[Adler92]

Did you fix this problem?

My 9N3 just turned 25,000 miles and is doing the same thing.
Just took it to the garage.

[koosh]

this was a very common problem with the mk3 golf/6n polo kind of era. brake cleaner on the butterfly valve of the throttle body intake and a good rub in would normally get rid of the carbon build up and do it, but for a thourough clean then taking it off and giving it a soak seemed to be better, but this obviously, as you say, requires a re-set with vag com/VCDS....
it was more of a when running hot kind of problem with the older cars though...