Smoke Testing (VW Transporter T3)

The check must be carried out at an oil temperature of at least 60 degrees C.

Blow out the engine from soot deposits while parked, giving full throttle 5 times.

Leave the engine running at idle speed.

Press the gas pedal all the way down as quickly as possible and hold it in this position for at least 2 seconds until reaching maximum RPM. Repeat these actions 3 times, each time leaving the engine to idle for about 10 seconds.

Evaluate the gases coming out of the exhaust pipe.

If a black cloud is clearly visible, you need to check the muffler according to the fault table in the section "Exhaust system".

The original text can be found on the portal (VWManual.ru)