Loss of Power

[JC07 ESC]

A3 1.4 tfsi 2012 89,500 miles 

Loss of power when accelerating and when I take foot of pedal it holds/accelerates for a second before slowing down. No blow of sound from turbo at all, maybe suggesting no boost. Has been plugged and comes back with no codes.

Fuel filter Clogged/faulty

Clogged fuel tank strainer 

Failing fuel injectors

Catalytic converter or exhaust plugged/restricting flow somewhere?

fuel pump not pumping as should? 

Blow off valve?

Surge valve stuck open?

Waste gate might be stuck open?

O2 sensor? 

MAF/MAP Sensor should throw code but has been known not to, maybe faulty? 

throttle body might be sticking or not letting enough air in or too much, running to lean etc?

Intake boot blown off?

these are the main issues that come with the extremely low power symptom.

timing chain failure? (has been done with water pump last year but when headgasket was done, it "jumped a tooth" not sure if it's stretched etc) spark plugs not been synced correctly after it jumped tooth, maybe knocked timing out? Although spark plugs were changed a month ago trying to fix this power issue, could this still be the case? 

Maybe need to test compression and also spark plugs individually.

It's been taken to 2 German car specialist garages as well as local garage. one has done head gasket and other done clutch and diverter valve. Now being told to take it to Main dealers which I have to wait 2 months for it to be diagnosed before they start any work, knowing full well no codes are gunna come up, and will be very costly as it's always just what ever the computers say these days, never problem solving mechanically. All the help would be much appreciated. Cheers

[KevinAudi80]

Hi, what you are talking about are turbocharger problems, you need to start something with it straight away, otherwise it will cost a bit to replace it. In my case it is colloquially said to be the turbo holes. 

[JC07 ESC]

39 minutes ago, KevinAudi80 said:

Hi, what you are talking about are turbocharger problems, you need to start something with it straight away, otherwise it will cost a bit to replace it. In my case it is colloquially said to be the turbo holes. 

Does this mean new turbo? How can I test it or what signs am I looking for visually to tell If it’s the turbo holes? 

[Steve Q]

When I had a rough running Volvo 940 I disconnected the maf sensor and it ran better. I knew mad sensor was faulty. Once it was replaced it ran spot on. Not sure if you can try that trick with the A3 as it's more technical. 

[JC07 ESC]

35 minutes ago, Steve Q said:

When I had a rough running Volvo 940 I disconnected the maf sensor and it ran better. I knew mad sensor was faulty. Once it was replaced it ran spot on. Not sure if you can try that trick with the A3 as it's more technical. 

Is it bad for the car/ecu to drive with it unplugged? Not sure if mines MAF OR MAS but I will certainly give it a go

[Steve Q]

Only unplug it to test to see how it runs. Don't continually drive it for miles. As I say it might not work as the A3 is more advanced than the old Volvo I removed the maf sensor on. 

[JC07 ESC]

12 minutes ago, Steve Q said:

Only unplug it to test to see how it runs. Don't continually drive it for miles. As I say it might not work as the A3 is more advanced than the old Volvo I removed the maf sensor on. 

That’s fine, I’ll test it later and see if it does fix issue or not, thanks 

[Steve Q]

20 minutes ago, JC07 ESC said:

That’s fine, I’ll test it later and see if it does fix issue or not, thanks 

No probs. You could do a small drive, but honestly you should know by how the car runs. 

Obviously don't rule out injectors. 

[KevinAudi80]

As far as the turbocharger is concerned, in my case it was the reconditioning of the old one that came to the rescue, but it was at the last minute that this happened. Do as a colleague suggests, and then if anything think further.