A4 throttle sticking - help please

[magpies]

Hi
this mornings drive to work - while accelerating and steady throttle everything seems ok

taking foot off throttle There is no engine braking engine is jerky and if knocked out of gear (not using clutch)the revs raise slightly and jerkily

if clutch is dipped then the revs return to tick over and if released retuens to give the above running

while steady speed if brake touched with left foot the throttle is not cut as would be the norm

any ideas (is it a throttle pot or bigger problem or even something simple????) the carpet is not to blame (not a Toyota)

[Tame Technician]

What type of A4. Its technically imposible for it to have a sticking throttle.

It is a B7 2.0TDI with a DPF?

You are sure its not the carpet matt??

[magpies]

Hi TT
sorry it is a Y reg 2.5tdi avante
I realise it cant be a sticking throttle as it is fly by wre but gives all the symptoms except for the fact as soon as the clutch is pressed the revs drop back to tickover

it is in for MOT tomorrow and after that I'm changing all the suspension - when that is done I will have time to take it to a place where it can be plugged into a diagnostic computer

I was wondering if anyone else had knowledge of this problem

Mick

[Tallbut Buxomly]

Sell it buy a prius problem solved!

[Tame Technician]

Not sure what that is on a 2.5, the 2.0TDI with DPF has hardly any engine braking while the DPF regens, is why I mensioned that, can feel like the engine is running away.

At a guess, and it is that, it could be running on its own oil a bit, 2.5TDI breather system is a bit iffy.

Still not sure how thats posible, especially why it would be different knocking it into Nuetral/ stepping on the clucth.

[magpies]

I've got it booked in for a diagnostic on Friday - so hopefully find something