The car has an erratic idle, it hunts to find the normal idling speed and
then settles down.

57 quid poorer and the garage informs me that there is a
"trace fault5 to failed throttle housing assembly" and they need to replace
the whole module.
That would make me 690+57 quid poorer.

Does anyone out there know if there could be another solution/cause to this
rather than a complete assembly replacement ?
Is there a better forum to ask this question on ?

Is there somewhere a throttle housing can be sourced for less than
364.62+VAT ?

BTW the MAF has already been changed which the garage attributed the
symptoms to the last time.

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
> The car has an erratic idle, it hunts to find the normal idling speed and
> then settles down.

Have a go at this...easy to do:

http://www.taligentx.com/passat/main.../throttlebody/

I think you can do most of it without removing the throttle-body from the
manifold, just pull the hose form the intercooler.
Afterwards do a throttle adaption by turning on the ignition( do not start
the engine) then turn it off after 5 minutes. Then start up and see if it's
better.

Rgds
Alec

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
> The car has an erratic idle, it hunts to find the normal idling speed and
> then settles down.

Have a go at this...easy to do:

http://www.taligentx.com/passat/main.../throttlebody/

I think you can do most of it without removing the throttle-body from the
manifold, just pull the hose form the intercooler.
Afterwards do a throttle adaption by turning on the ignition( do not start
the engine) then turn it off after 5 minutes. Then start up and see if it's
better.

Rgds
Alec

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
> The car has an erratic idle, it hunts to find the normal idling speed and
> then settles down.

Have a go at this...easy to do:

http://www.taligentx.com/passat/main.../throttlebody/

I think you can do most of it without removing the throttle-body from the
manifold, just pull the hose form the intercooler.
Afterwards do a throttle adaption by turning on the ignition( do not start
the engine) then turn it off after 5 minutes. Then start up and see if it's
better.

Rgds
Alec

 

"Alec" <alec@doesnotexist.demon.co.uk> wrote in message
news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>
> "Stuart" <dontuse@this.co.uk> wrote in message
> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>> The car has an erratic idle, it hunts to find the normal idling speed and
>> then settles down.
>
> Have a go at this...easy to do:
>
> http://www.taligentx.com/passat/main.../throttlebody/
>
> I think you can do most of it without removing the throttle-body from the
> manifold, just pull the hose form the intercooler.
> Afterwards do a throttle adaption by turning on the ignition( do not start
> the engine) then turn it off after 5 minutes. Then start up and see if
> it's better.
>
> Rgds
> Alec
>
Thanks Alec, will give it a shot.
Regards
Stuart

 

"Alec" <alec@doesnotexist.demon.co.uk> wrote in message
news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>
> "Stuart" <dontuse@this.co.uk> wrote in message
> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>> The car has an erratic idle, it hunts to find the normal idling speed and
>> then settles down.
>
> Have a go at this...easy to do:
>
> http://www.taligentx.com/passat/main.../throttlebody/
>
> I think you can do most of it without removing the throttle-body from the
> manifold, just pull the hose form the intercooler.
> Afterwards do a throttle adaption by turning on the ignition( do not start
> the engine) then turn it off after 5 minutes. Then start up and see if
> it's better.
>
> Rgds
> Alec
>
Thanks Alec, will give it a shot.
Regards
Stuart

 

"Alec" <alec@doesnotexist.demon.co.uk> wrote in message
news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>
> "Stuart" <dontuse@this.co.uk> wrote in message
> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>> The car has an erratic idle, it hunts to find the normal idling speed and
>> then settles down.
>
> Have a go at this...easy to do:
>
> http://www.taligentx.com/passat/main.../throttlebody/
>
> I think you can do most of it without removing the throttle-body from the
> manifold, just pull the hose form the intercooler.
> Afterwards do a throttle adaption by turning on the ignition( do not start
> the engine) then turn it off after 5 minutes. Then start up and see if
> it's better.
>
> Rgds
> Alec
>
Thanks Alec, will give it a shot.
Regards
Stuart

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:4Qmhe.75967$Cq2.45788@fe2.news.blueyonder.co. uk...
>
> "Alec" <alec@doesnotexist.demon.co.uk> wrote in message
> news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>>
>> "Stuart" <dontuse@this.co.uk> wrote in message
>> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>>> The car has an erratic idle, it hunts to find the normal idling speed
>>> and then settles down.
>>
>> Have a go at this...easy to do:
>>
>> http://www.taligentx.com/passat/main.../throttlebody/
>>
>> I think you can do most of it without removing the throttle-body from the
>> manifold, just pull the hose form the intercooler.
>> Afterwards do a throttle adaption by turning on the ignition( do not
>> start the engine) then turn it off after 5 minutes. Then start up and see
>> if it's better.
>>
>> Rgds
>> Alec
>>
> Thanks Alec, will give it a shot.

Also check for vacuum leaks - that's a common source of poor idling on a
1.8T

I've just cleaned the TB on a 1.8 (non turbo) in an Audi A4 this afternoon &
found a small vac hose that was split. Idle is sorted & its cured a "flat
spot" that was there at about 4.5 - 5K rpm. I'd say your chances are better
than even of fixing it - at which point you can go ask for the money back
for the MAF

I.

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:4Qmhe.75967$Cq2.45788@fe2.news.blueyonder.co. uk...
>
> "Alec" <alec@doesnotexist.demon.co.uk> wrote in message
> news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>>
>> "Stuart" <dontuse@this.co.uk> wrote in message
>> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>>> The car has an erratic idle, it hunts to find the normal idling speed
>>> and then settles down.
>>
>> Have a go at this...easy to do:
>>
>> http://www.taligentx.com/passat/main.../throttlebody/
>>
>> I think you can do most of it without removing the throttle-body from the
>> manifold, just pull the hose form the intercooler.
>> Afterwards do a throttle adaption by turning on the ignition( do not
>> start the engine) then turn it off after 5 minutes. Then start up and see
>> if it's better.
>>
>> Rgds
>> Alec
>>
> Thanks Alec, will give it a shot.

Also check for vacuum leaks - that's a common source of poor idling on a
1.8T

I've just cleaned the TB on a 1.8 (non turbo) in an Audi A4 this afternoon &
found a small vac hose that was split. Idle is sorted & its cured a "flat
spot" that was there at about 4.5 - 5K rpm. I'd say your chances are better
than even of fixing it - at which point you can go ask for the money back
for the MAF

I.

 

"Stuart" <dontuse@this.co.uk> wrote in message
news:4Qmhe.75967$Cq2.45788@fe2.news.blueyonder.co. uk...
>
> "Alec" <alec@doesnotexist.demon.co.uk> wrote in message
> news8CdncRhZfPzWhjfRVnyrw@pipex.net...
>>
>> "Stuart" <dontuse@this.co.uk> wrote in message
>> news:6jjhe.75898$Cq2.36245@fe2.news.blueyonder.co. uk...
>>> The car has an erratic idle, it hunts to find the normal idling speed
>>> and then settles down.
>>
>> Have a go at this...easy to do:
>>
>> http://www.taligentx.com/passat/main.../throttlebody/
>>
>> I think you can do most of it without removing the throttle-body from the
>> manifold, just pull the hose form the intercooler.
>> Afterwards do a throttle adaption by turning on the ignition( do not
>> start the engine) then turn it off after 5 minutes. Then start up and see
>> if it's better.
>>
>> Rgds
>> Alec
>>
> Thanks Alec, will give it a shot.

Also check for vacuum leaks - that's a common source of poor idling on a
1.8T

I've just cleaned the TB on a 1.8 (non turbo) in an Audi A4 this afternoon &
found a small vac hose that was split. Idle is sorted & its cured a "flat
spot" that was there at about 4.5 - 5K rpm. I'd say your chances are better
than even of fixing it - at which point you can go ask for the money back
for the MAF

I.