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
