I have a Jetta A 4 2002 and, when driving, it suddenly jerks, EPC and oil indicators turn on and it loses power until it stalls. I try to speed it up but it won't answer properly. Only after 20-30 minutes the engine will start again. The car has been tuned, the battery, oil pump and air sensor changed but it keeps doing the same thing. Can anyone help me? It really worries me when I'm driving and it suddenly stalls.

Under heavy acceleration, when the RPM reaches 5,000, the car loses power and goes into limp mode. The EPC and Traction Control lights turn on. When this happens, the transmission stops shifting and jerks or stutters a few times. Note: The car originally had a 1.6L engine, but it has been swapped with a 2.0L engine. However, the original 1.6L ECU (Computer) and wiring harness have not been changed. "

The mass airflow dies after 20 minutes of replacement. It dies and stop working and the car loses power, until I kill the engine and start it again and it gains power again, then after 3 minutes drive it loses power again

The car can lose power easily because of this wires who are not connected properly to the 4 pin sensor

Whilst driving my 2009 1.9 TDi Jetta suddenly lost power and then died. It starts but dies almost immediately. There is smoke coming from behind the turbo. There is no exhaust gasses coming out of the back at the exhaust. If I disconnect the airflow hose to the intercooler the engine runs.
If i disconnect the air to the intercooler the engine still runs.
Whilst doing either one of the above and i disconnect the air intake from the air filter their is exhaust smoke coming from out ( so it is blowing air instead of sucking.