Hi,

I just replaced my spark plugs because they have worn out after more than 80,000 km. Before this, I used NGK IX6 (4 units) and NGK Iritop6 (4 units). I replaced with NGK IX6 (4 units) and NGK Iriway7 (4 units). It seems like the performance a bit different. The response quite slow and fuel consumption a bit high. Please advice me.

Thank you.

 

what do you mean by recalibrate? Spark plug change is just that take off old put in new.
Did you replace the spark plug wires too? if so go back to old one and see if it makes any difference. If it doesn't, go back and replace spark plugs with old ones and see if that makes difference.

 

I mean change the setting according to new plugs. Yes, I changed the coil plugs as well because I thought the jerking problem because of coil plugs unfortunately it was because of the spark plugs. I bought a used set of 8 coil plugs and currently using them now. The previous ones I kept in the box.

 

Do you mean the Spark Plug Gap?


This should be set to factory spec (look on the sticker on the hood).

Many Iridium plugs are available in different gaps for otherwise identical product, because the very small electrodes are fragile. That way you don't have to mess with them.


Some Fit folks DO change the gaps in an attempt to reduce stutter, however.



I always check the SP gaps prior to installation just to assure that rough handling hasn't affected anything. That said, I have not noticed any problems in the last few years (better packaging?).

Other than that, there should not be any other calibration needed after installing plugs.




If you messed with anything else (cleaned throttle body, disconnected battery, valve adjustment) I'd do the Idle Learn Procedure...