Effects of Leakage At Intake and Exhaust End

Effects Of Leakage At Intake And Exhaust End

Leakage downstream of Mass Air Flow sensor
- Effect: Loss of power

Possible fault sources:
1. Hose connection between mass air flow sensor and turbocharger
2. Connection hose to crankcase breather
3. Connection hose to mechanical air recirculation valve

Leakage downstream of turbocharger
- Effect: Charge air pressure too low

Possible fault sources:
1. Connection hoses and line between turbocharger and charge air cooler
2. Hose between charge air cooler and intake manifold
3. Charge air cooler
4. Gasket of Charge air pressure sensor G31 (in charge air cooler)
5. Gasket between throttle valve control module and intake manifold
6. Gasket between intake manifold and cylinder head