Common Injector Issues in Toyota Prado & Hilux KUN26

The Toyota 1KD-FTV engine, powering the Hilux KUN26 and Prado, is known for its strong performance and reliability. However, as these vehicles age, fuel injectors can wear out and cause significant performance issues.

Signs you may need injector replacement:

1. Rough Running & Misfires  Damaged injectors disrupt fuel delivery, leading to poor combustion, engine knock, and an uneven idle.

2. Hard Starts Difficulty starting, especially on cold mornings, can be linked to weak injector spray or air leaks in the fuel system.

3. Black Smoke Leaking injectors or poor atomisation can cause excess black smoke from the exhaust.

4. Poor Fuel Economy If your engine is mechanically sound but using more fuel, the injectors may be over-delivering.

5. Strong Exhaust Smell Unburnt fuel caused by faulty injector seat washers can create a noticeable and unpleasant smell.

6. Engine Knock Incorrect injection timing due to injector wear can cause a knocking sound, especially when cold.

7. Carbon Build-Up Worn injectors can lead to carbon deposits in the intake and combustion chamber, affecting airflow and performance.

8. Fuel Leaks & Warning Lights Leaking injectors can cause pressure loss and trigger warning lights, requiring urgent replacement.

Why Replacement Is the Best Solution

While cleaning may temporarily improve performance, replacing worn injectors offers a long-term fix. Quality replacement injectors restore power, improve efficiency, reduce emissions, and protect the engine from further damage.

Final Takeaway If you notice these symptoms in your Toyota Prado or Hilux KUN26, timely injector replacement is essential for maintaining performance and avoiding costly repairs.

Read more: Toyota Injector Issue Diagnosis for 1KD Prado & Hilux KUN26