Throttle body stuffed?(New TB Fitted, New codes) :(

[__B3NNY__]

I was out the other night in the car and all off a sudden the engine dropped to idle speed and wouldnt rev above 1k the ECP and also the engine managment light is on, i managed to get to where i was going luckly just around the corner. After the engine had been off for about an hour i restarted the engine and everything was ok but now its back to how it was the other night.

Ive taken the TB off gave it a clean with some IPA and refitted and if anything its worse the revs are all over the place on idle and more often than not it stalls on its self.

These are the codes im getting, im pretty sure it points to a duff TB but wouldnt mind sombody confirming before i buy a replacment.

Please click the image to make it clear.


Cheers

 

[caney]

i've got a tb mate you can have if it comes to it

 

[__B3NNY__]

Nice one, cheers.

Im pretty sure its pointing to the TB just wouldnt mind sombody confirming before i part with any cash.

How much you looking for?

 

[__B3NNY__]

Bump,

Ive got a throttle body on the way, anything else it maybe if that fails?

 

[LEE69]

Might be the sensor on the actual pedal, rather than the throttle body itself?

 

[__B3NNY__]

Would that be one of the angle sensors?

Would the throttle actuator malfunction code not point directly to the TB itself?

 

[LEE69]

If the angle sensor on the throttle pedal sends the wrong (or no) signal, that must give the error?

 

[DPJ]

Pedal will give it's own separate codes...?

Your codes look fairly damning for your TB......

 

[wild willy]

Yep definately throttle body, i had exactly the same codes when mine was mechanically jammed. double check nothing is siezing it. also with it diconnected you should be able to open the butterfly manually and it will return to its original position.

 

[__B3NNY__]

Well my TB should be getting deliverd by the end of the week, nothing seems to be seized on it as when i took it apart the coggs inside moved freely and the butterfly done the same, so i assume somthing has given way which controls the movment of the flap?

One thing i did notice was when i moved the flap it did return but left ~1mm gap at the top and bottom of the flap like it was sat at an angle? I have tryed to realign it via vagcom but all i got was ERROR in the colum where it usally says APT OK.

Cheers.

 

[wild willy]

To be honest mate, both of my TB's dont return to the fully shut position either which you expect they would for correct operation to pull the vaccum in the intake mani to operate the DV when off throttle.

 

[__B3NNY__]

Ahh so its normal, i did think it should close completly. Was you still able to move your butterfly when it failed when disconnected?

 

[wild willy]

Yes mate, moveable and spring returned it to the original almost shut position. Have you tried to have a look inside the motor / actuator housing.

 

[__B3NNY__]

Fitted my working TB yesterday and it hasnt made any differance at all, It will idle fine for a few minutes and then the revs will jump about all over the place and it sounds like it wanted to stall on itself.

When i try to do a TB alignment it just shows error in the last box, What i do find strange is that when you first turn it on and start the engine there is no lights and the engine idles fine it isnt until a few minutes after or you give it a blip of the pedel that the EPS light and somtimes the traction light will come on and it will start to rev hunt turn it off and then on again and its back to normal

Its bought up these codes now after fitting the new TB.

Any help would be great as its really stating to bug me!

 

[LEE69]

I stand by what i think and it's the throttle pedal sensor.

 

[__B3NNY__]

Where abouts will i find it on the pedel itself? What about replacing it, New pedel?

Am i right in thinking that the throttle valve controller would be the pedel?

Not sure how this would stop the throttle body aligning itself tho?

Just had a search threw the ross-tech site and it keeps pointing me back to the TB, thing is im sure i can hear it click when i blip the pedel, which leads me to think it may be a wiring issue?

 

[LEE69]

You can remove the pedal easily and the sender is on that.


By lee69


Check voltage supply and cables to control unit
– Remove driver's side stowage compartment → Rep. Gr.68
– Pull 6-pole connector off accelerator pedal position sender.
– Switch on ignition.

– Connect multimeter to measure voltage at the following connector contacts.




By lee69


6-pin connector, contact Measure at
1 Earth
1 Contact 5
2 Earth
2 Contact 3
Specification: 4.5 V min

– Switch off ignition.
If the specification is not obtained:

– Connect tester -VAG 1598/31- to control unit cable harness, without connecting engine control unit.

 

[wild willy]

Where abouts will i find it on the pedel itself? What about replacing it, New pedel?

Am i right in thinking that the throttle valve controller would be the pedel?

Not sure how this would stop the throttle body aligning itself tho?

Just had a search threw the ross-tech site and it keeps pointing me back to the TB, thing is im sure i can hear it click when i blip the pedel, which leads me to think it may be a wiring issue?

was your new TB second hand. it still points toward the TB to be honest but its certainly worth investigating the other suggestions.

 

[__B3NNY__]

It was a 2nd hand TB yes but as far as im aware it was still working when removed as it was only removed due to a R32 TB and a SEM intake being fitted.

Im going to whip it off again tommrow and give it a clean, failing that it looks like a garage job as electrics arent by best subject.

Thanks for the diagram Lee.