No Throttle Response

[pazz]

Only when cold & after a couple of mins driving - no throttle response after coming to a stop/slowing to a stop. Leaves me stranded at junctions!
Shut engine off - restart - won't rev, even in neutral. Sits on 1k revs.
Place in neutral and it won’t rev whatsoever, place in Drive or Reverse and put foot down, after several attempts it’ll kick in, and then drive as normal for the rest of the day! - Always OK when warm.

Indications
None! No transmission flashing lights, no CEL or DTC's, nowt in memory when scanned with VCDS

Tried
Throttle Body & Butterfly plate removed & cleared of gunk then re-aligned adaptation via VCDS
Garage checked for vacuum, lean codes and emissions ok
MAF & Air Filter replaced
Brake Pedal sensor replaced – it cut’s out throttle and is “known fault”
10 tanks of Premium fuel used, and countless injector cleaners/additives over past months.

This has been occurring for about once a week for 6 months now.
Any advise gratefully received!!
A4 cab 3.0 V6 Auto - ASN 8H7 2003

[mikeybutch]

This reminds me of a similar problem with my sons S3 which spent 3 months with an inde and then main dealer who eventually changed the throttle body and fixed it .Their conclusion was that the diagnostics had failed to pick up the fault in the sensors so it came down to changing parts one at a time until they found the faulty one.Very time consuming and costly but the inde made no charge cos it went into them perfect for a clutch and belt change and came out with the fault although they denied that they had caused it