Category: Guides and Diagnostics

Posts related to Guides and Diagnostics

Failed turbocharger: symptoms, causes and how to avoid breaking it

Failed turbo: symptoms (loss of power, smoke, whistle), real causes (oil, variable geometry) and how to prevent failure. MasterTuning.
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Dirty throttle body: symptoms and cleaning with adaptation

Dirty or faulty throttle body: rough idle, stalling, engine light. Cleaning, software adaptation and when to replace it. MasterTuning.
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Faulty lambda sensor: symptoms, fuel consumption and fault codes

Faulty lambda sensor: symptoms (high consumption, rough idle, P0130-P0141), the difference between the front and rear sensor. MasterTuning diagnosis.
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Clogged catalytic converter: symptoms and how to check it

Clogged or worn-out catalytic converter: symptoms (loss of power, smell, P0420), how it is checked with back-pressure, and MasterTuning solutions.
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Dirty EGR valve: symptoms, cleaning and when to replace it

Dirty or stuck EGR: symptoms (rough idle, smoke, loss of power), cleaning or replacement and what the law says. MasterTuning diagnosis.
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Hard cold starting: causes on diesel and petrol

The car struggles to start when cold: causes (glow plugs, battery, fuel pressure, injectors) and how to find them. MasterTuning diagnosis.
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Turbo whistle: when it is normal and when it is a fault

Whistle or whine from the turbo: how to tell the normal noise from a worn bearing or an air leak. MasterTuning checks and solutions.
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Vibration at idle: shaking engine, causes and fixes

The engine vibrates at idle: causes (engine mounts, injectors, spark plugs, EGR) and how to tell them apart. Professional diagnosis by MasterTuning.
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Jerking under acceleration: why the car hesitates

Jerking, hesitation and flat spots under acceleration: causes on diesel and petrol (injection, ignition, turbo, EGR) and MasterTuning diagnosis.
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The car cuts out while driving: causes and what to do

The engine cuts out while you are driving: electrical and fuel supply causes, what to do safely and how the fault is found. MasterTuning.
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