If the converter is okay, then the MAF sensor may be faulty and in need of replacement. This should be checked using a back pressure gauge and if it is the cause, the converter will need to be replaced. If the problem remains then it could be that the exhaust is clogged due to a failing catalytic converter. The connections should be checked to ensure they are tight and corrosion free.

It should be removed and cleaned with MAF sensor cleaner and replaced. The first is a dirty mass air flow (MAF) sensor. Since many of the common causes of this kind of issue have been checked and have been found to be problem free, two likely causes remain.

Fuel pump, air filter, plugs, etc., are all okay. Why does a 1995 Audi A6 Quattro start and run fine for about 20 miles and then shut off and not start for some time?Ĭase Details: After waiting for a while the vehicle starts but the same cycle is repeated. You will get the professional expertise you need to identify and resolve the problem in the correct manner.Ĭontinue reading to see some of the questions Experts have answered. This is where the insights of verified mechanical Experts can be very helpful. Knowing if the sensor or some other component is the cause of your problems requires specialized knowledge. Among the most common are problems with the Audi mass air flow meter. Is your Audi losing power or hard to start? Does it suddenly surge for no apparent reason? There are many possible reasons for these and other performance issues.

Audi a4 mass air flow sensor problems