I changed spark plugs on sato, and since then I’m experiencing higher engine hum/noise from around 55km/hr going to 100km/hr when its loudest almost causing a small vibration. The consumption is also much higher than before.
kama ni ya lexus Toyota kenya shop wanauzanga ile ordinary moja 570 or thereabouts (20,000km). Iridium 2500 moja (100,000km I guess). Toyota uses genuine denso. Lakini ujue denso na NGK ni mingi sana na majority kwa market ni fake. Some modern vehicles use very high voltage ignition so ordinary you got to change with every service. lakini ukienda kwa dealer na chassis/part number utapata specification correct ya spark na mileage inafaa kuenda.
Get plugs that have a sharp point. From the picture, plugs zako cannot withstand moto. either juu ni fake or not the best fit for your car. And i bet they cost about 1500. Get the sharp pointed ones going for about 5K. You would regret. Gari itachoma poa and will be fuel efficient.
When choosing spark plugs one has a lot of options. One of the differences is the diameter of the electrode tip - some spark plugs have a large flat tip, and newer models often have a really thin tip. There are many options in between as well, I’ve seen exact recommendations for certain models.
As far as I know the spark usually is emitted from the sharp edges of the tip, as the electrical field is the strongest at those points and discharge happens there. Sometimes grooves are added to the tip to increase the length of these edges. So what is the effect of different diameters, is a thinner tip always better?
I changed from the plugs on the left to the plugs on the right. And i can tell you that the difference is instant. Car has power and is now very fuel efficient! They cost more but in the long run, you save so much more!!