2026-10-08 · 5 min read
Mitsubishi Pajero Sport Diesel Injector Malaysia
Pajero Sport 4N15 uses Bosch common-rail piezoelectric injectors — the same type as the Triton. Each injector has a unique calibration code that must be programmed to the ECU after replacement; an uncoded injector causes rough running and smoke. Signs of injector problems: rough idle, misfires, excessive black smoke, worsening fuel economy. Injector ultrasonic cleaning is available as a cost-effective service before replacement becomes necessary. Protecting injectors with clean fuel and timely filter changes is far cheaper than replacement.
Fuel injectors spray a fine mist of petrol directly into the combustion chamber (or intake port). Over time, carbon deposits and varnish from Malaysian petrol build up on the injector tips, disrupting the spray pattern and causing rough idle, increased fuel consumption, and hesitation.
Symptoms of dirty or faulty injectors
- Rough idle — engine vibrates or shakes at traffic lights
- Increased fuel consumption without any change in driving habits
- Hesitation or stumble when pulling away from standstill
- Failed emissions test — HC (hydrocarbons) reading too high
- Check engine light with misfire codes (P0300–P0308)
Cleaning vs replacement
For most cases, professional ultrasonic injector cleaning (off-car) restores flow rate to within 3–5% of new. This is far cheaper than replacement and effective for moderate carbon build-up.
Cost at 4M Car Care: cleaning RM 150–300 (full set), replacement RM 300–800 per injector for OEM-quality units. Direct injection engines (GDI, TFSI, EcoBoost) accumulate carbon faster and typically need cleaning every 40,000–60,000 km.