What can cause a cylinder not to work?
Causes include worn, fouled or damaged spark plugs, bad plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder.
Which Audi engines have problems?
Engine codes known to be affected include CAEB, CDNC and CNDC (list being updated). The problem seems to have been corrected when the facelift was released. But all A5 TFSI engines before that, i.e. 2008 – 2012, are susceptible. The overwhelming majority of reports are for the 2.0, but 1.8 TFSI is also affected.
Why does a VW engine have 5 cylinders?
Engines with 5 cylinders are normally known to have better torque than horsepower, due to the engine ratio of bore to stroke. Although it is rather unconventional, this engine is widely known for being Volkswagen’s most bullet proof engine. The problems listed below are more like minute issues, not necessarily widespread engine problems.
Why does my Audi engine leak so much oil?
In advanced cases there can be noticeable smoke from the exhaust under heavy acceleration, and it is also known to damage the actual cylinders themselves, causing scoring in the bores. One theory is that these grooves cause more and more oil to leak around the pistons, hence the problem gets progressively worse.
What causes oil sludge in a VW 1.8T?
Engine sludge is the formation of thick oil deposits, caused by moisture or heat, that collect in the engine and, if not acted on, can cause blockages in every inlet/outlet and the oil pickup tube. Why this is so common in 1.8’s is because Volkswagen provided the engine with an undersized oil supply.
What causes high oil consumption in Audi A5?
The early version of the TFSI petrol engines found in the A5, A4 and Q5 have an inherent design fault which leads to high consumption of oil. The base problem seems to relate to the piston rings, which allow small amounts of oil to leak round the pistons into the cylinders, where it burns and therefore leads to high oil consumption.