Author Archive: MasterTuning

Author Archives for MasterTuning

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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Car won’t start but the starter turns: causes and solutions

The starter turns but the car will not start: causes on diesel and petrol (fuel, immobiliser, crank sensor, glow plugs) and MasterTuning diagnosis.
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Sudden increase in fuel consumption: why and what to check

The car uses more fuel: mechanical and electronic causes of increased consumption (lambda sensor, injectors, DPF, tyres) and MasterTuning checks.
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