Spark Plugs Condition

[tabrez]

Hello Everyone,

I have been observing that my J200 fuel consumption has been increasing over the past few months. Recently i got my Injectors cleaned, MAF Sensor cleaned, New Air Filter installed (stock), Throttle body also cleaned, swapped ignition coil (used), spark plugs also changed; still no use. While checking the spark plugs after driving a month, the center electrode is pure white. checking online showed me that the spark plugs are running hot, because of pre-ignition or cooling system not effective. Pre-ignition i cannot see, and also the rpm is stable (no fluctuation). Cooling system, recently flushed and poured new coolant and levels are OK.
My mechanic is saying somehow the spark plugs are short-circuit something (could not understand). below is the picture of my spark plugs.
Could anyone tell what should i do.

 

[OregonLC]

That just looks like a normal new and clean plug to me. It's not burnt. If it's running smooth and has good power it's probably not spark or fuel.

Does the exhaust smell like fuel? How are you calculating your excess consumption? Is there perhaps a brake caliper dragging, a tire inflation problem, alignment issue, or something else causing excess drag?

This is a poor image, but here are some condition pictures.

 

[linuxgod]

That plug looks ok to me.

Tires are in my experience the #1 culprit of poor mileage. Check your PSI. If you’ve recently replaced your tires then don’t be shocked if you see a 10% mileage hit.

Lots of other things can cause reduced mileage as pointed out above. In addition things like deteriorating O2 sensors, dirty injectors, restricted air flow can though you see to have tried those. Personally I’ve found my mileage drops off about when I’m towing and using regular gas instead of premium, though normally around town it doesn’t matter much.

Higher ethanol content and different seasonal gas blends can affect mileage as well. I find my mileage driving through Nebraska alway seems to be at least 10% lower even at the same speeds. Annoyingly it takes 2 or 3 tanks of “good” gas before the ECU recalibrates whenever it’s compensated for engine knock/timing

Before throwing too much $ at this I’d get a good OBD2 reader and an app like obd fusion and spend some time monitoring A/F mix, timing correction, and checking for any hidden codes. You could spend thousands of dollars replacing random parts unnecessarily to save $5-10 per fill up

 

[skrypj]

Agree, get an OBD reader and look at the fuel trims and for codes. If they fuel trims are in ok shape and there are no codes, then I think you can safety assume that there is nothing wrong with the motor and that something is causing additional drag(tires, stuck brake caliper, etc)