Russia Problems: Urgent Help Needed!

Hello TDI enthusiasts!

I have a 1993 Audi 80 TDI with engine code 1Z. In recent weeks, there has been an increase in smoke production. The car also has 220,000 km on the odometer, but I drive it very carefully. Two years ago, a new timing belt, valves, and cylinder head were installed. Normally, I consume around 5.5 to a maximum of 6 liters when driving economically on the highway. Yesterday, the fuel consumption was significantly higher despite the same driving style. Could this be related to the electronics, such as a faulty mass airflow sensor or a problem with the engine control unit?

I am grateful for any suggestions that could help solve the problem!

Thank you very much, Andreas B.

Hi.

Take a look at the EGR valve. If it's not sealing properly, you can get exactly these kinds of effects.

The specific details are explained in the AGR technical article on Rainer's website.