My wife has a 06 element, bout 170,000 miles. Couple months ago went and got oil changed and got injecters flushed. Later that day check engine light came on, misfire in cylinder #1. Changed spark plugs to ngk laser iridiums. Mileage has dropped from 350 miles average tank to 250 or less usually around 230. I changed the plugs again to a less hot plug to autolites. I have changed all 4 coil packs, put various fuel additives and oil additives. Has a buddy hook up his high dollar snap on computer and check everything out and didn't see anything wrong. I'm stumped anyone have any suggestions on what is wrong with the car????

 

what plugs is it supposed to have? like OEM.

in my experience Honda engines hate anything other than the OEM spec & brand plugs.

is the car properly aligned?

 

Hello,
NKG plugs are as good as original equipment, have you set the gap correctly?
See NGK website >>> NGK Spark Plugs USA

Happy CR-Ving

Kev

 

Try this -

Disconnect your battery (neg and pos) for about 15 minutes to allow the computer to reset. Then drive another tank down and see if there is any difference. Wondering if your mixtures are off after that injector cleaning.