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What you have is not a fuel issue, the whole plug is rusted.
Btw. I can bet you that if you just cleaned it with 2 swipes of a brush and reinstalled it, it will work sweet.
Depends on material
use a DMM with a Hz scale, - basic math calculation for a 4 cyl engine timed from the distributor - and you can make your own rpm meter.
I was facing fuel economy issue. Why is it rusted then?
You can get AE100 rpm meter for your car.
I'm sane enough and I got money for mantainance too. I changed coz they looked bad and tip was about to end.83k kms or 100k kms who cares? They served a long time.
True. I also said that its a good practice as 83k kms is a lot of mileage infact. But these plugs can work till 100k kms.
Mostly they don't throw them intentionally, I've seen many with worn out tips and gaps gone from 1.1-1.2mm and some ustaad say gap karlein jee sir chalega... So this is due to bad fuel quality, spark knock is very common problem here. Else the plug manufacturers always say the same like xulfiqar said.
simple circuit. i can share a diagram. you can also add a shift light but peyara nae lagna. oem laien laien.
sae. will share a diagram.
