Troubleshooting — Fuel and Exhaust Systems (Audi 80 B3)

Excessive fuel consumption

• The mixture is not adjusted correctly
• The air filter element is clogged
• Fuel leak
• Incorrect upper float position (carburetor)
• The heating regulator or fuel dispenser is faulty (fuel injection system)

Insufficient fuel supply or poor mixture

• The fuel pump is faulty
• The fuel filter is clogged
• Fuel leak
• Needle valve sticking (carburetor)