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Nightmare!!


SlowBloke

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I have a 2010 Fabia fitted with the 1.6L diesel engine. The car has done 48K miles.

 

Last December the engine was running very poorly. A friend lent me an OBDII dongle and together we checked the fault codes - None. Then we went for a short uncomfortable drive. The engine wouldn't accelerate until it had gone about 400 yards in first gear. It then stuttered, stalled and blue large clouds of white smoke while being driven at normal speeds. 

 

The only curiosity we could see was the 'Absolute Throttle Position' was static at 88%. I assumed this was the throttle pedal position so I ordered and fitted a new throttle assembly. But over the last couple of weeks the car is again running badly. Checking the Error Codes etc. this morning I noticed again that the Absolute Throttle Position is still 88%. So what does this reading indicate? Any ideas greatly appreciated. 

 

I suspect the gadget on the engine which actually opens the throttle is stuck or the connection to it is faulty. I don't want to put the car into the hands of a Skoda dealer as the car is overdue (and I hope always will be) for the so called fix that Skoda developed for this engine because of Dieselgate.

 

Now yesterday the car was again awful. 5 miles of smoke bad enough for following drivers to give up followed by bad running until I pushed the car to maximum acceleration for a few miles (in Norfolk there are few roads where you can safely do his). This morning the car started from cold and ran well. I wouldn't have suspected anything had ever been wrong. Again no fault codes.

 

By the way, I now have my own OBDII dongle. It comes from a US company called Blue Driver who also supply a very effective app to read the dongle. The only problem is that in America Skoda cars rarely appear so there is no option to select my car. BUT, it works well if a small VW of similar age is selected. The dongle is available from Amazon in the UK.

 

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23 minutes ago, SlowBloke said:

I don't want to put the car into the hands of a Skoda dealer as the car is overdue (and I hope always will be) for the so called fix that Skoda developed for this engine because of Dieselgate.

 

The ‘fix’ is not compulsory, so inform them you do not wish for it to be done.

 

Look in my signature for someone local with VCDS, this will bring up fault codes that generic readers cannot find.

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If the throttle always reads 88% or whatever, it does not mean the position sensor is stuck.  It means the dongle or app is not able to determine the throttle position.  It's the same on mine.  If it really was stuck the engine would go to max revs as soon as you started the engine.  Did you check the reading with the new sensor fitted?

 

 

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5 hours ago, SlowBloke said:

Thanks for your advice Gizmo. I don't trust the dealerships not to find a hundred 'faults' and fix them at considerable cost to me. 

Find a local VAG specialist and take it to them - before we moved to Devon we used to take all our cars (Audi RS4, Skoda Fabia and even a Citroen C1) to a VAG specialist in Totton and they did a much more honest and better priced job than any of the local main dealers.

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39 minutes ago, kelper said:

Modern petrol engines don't have a throttle either.  But we all know it is the accelerator pedal.

Is that right? It's some years since I looked at a petrol engine, but I'm not sure I can see a way for it to operate without a throttle system.

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All 

54 minutes ago, kelper said:

Modern petrol engines don't have a throttle either.  But we all know it is the accelerator pedal.

Strange that my Yeti 1.8 TSI and Kodiaq 2.0 TSI  I’m awaiting on both have throttle valves.

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Throttle pedal and accelerator pedal as were and still is depending on what you want to call it.

 

As to throttle / accelerator cables they went, as did choke cables, (study Martial arts, there is a difference between a choke hold / choking and throttling someone.)

as for for all the rest of it, injection, carbs who cares if people do not know what is what, or study mechanical engineering or the internet.

Edited by AwaoffSki
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There are petrol engines without throttle valves, I think, where variable cam timing limits the incoming air mass. Not many though.

Most modern diesel engines also have throttle valves to help with both engine shutdown smoothness, and EGR regulation.

Edited by Wino
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1 minute ago, Wino said:

 

Most modern diesel engines also have throttle valves to help with both engine shutdown smoothness, and EGR regulation.

 

More correctly called an anti shudder valve. Although also used to partly close when egr function is called for to create a vacuum in the intake system.

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