a few months ago i replaced my plugs with NKG 2667 and also changed wheels / tyres at the same time.
since then when cruising at low rpm with some load (around 1500) and going 50kmh, 60kmh, 70kmh; the car was making some noise as if the bearing was gone and it felt lethargic. i thought it was the tyres...
a few days ago i did some reading and found out that the spark plug gap for the Tiguan TSI is 1mm-1.1mm, not 0.8mm. when i fitted the NGK plugs, i did not regap them. i had no issue with the Mk6 GTI TSI engine using the same NGK factory gap (i.e. 0.8mm) for these plugs.
yesterday morning i removed the plugs and regapped them to 1mm, refitted at 18ft lbs torque and yes, the noise is gone and power is restored! cruising at low rpm (with some load), the car goes quietly and nicely
since then when cruising at low rpm with some load (around 1500) and going 50kmh, 60kmh, 70kmh; the car was making some noise as if the bearing was gone and it felt lethargic. i thought it was the tyres...
a few days ago i did some reading and found out that the spark plug gap for the Tiguan TSI is 1mm-1.1mm, not 0.8mm. when i fitted the NGK plugs, i did not regap them. i had no issue with the Mk6 GTI TSI engine using the same NGK factory gap (i.e. 0.8mm) for these plugs.
yesterday morning i removed the plugs and regapped them to 1mm, refitted at 18ft lbs torque and yes, the noise is gone and power is restored! cruising at low rpm (with some load), the car goes quietly and nicely

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