Checking the automatic engine start system (VW Transporter T3)

Remove the air filter from the carburetor.

Press the gas pedal slowly once, air damper (upper valve in carburetor) must be completely open.

Start the engine.

Give a little gas so that the limit screw does not press against the stepped washer.

Depending on the outside temperature, the air damper should open after about 5 minutes. Otherwise, check the integrity of the bimetallic spring or check the power supply of the automatic engine start system.