What spark plugs should i use on my fx

B

Bebofx35

Member
Location
New york
I have an 04 fx34 with 108k I wanna change my spark plugs just in case I was told to go to the dealer but I found out they are ngk also. Which spark plugs you guys recommend that are better perfomance for the fx thank you
 
Did you feel any difference

---------- Post added at 07:16 AM ---------- Previous post was at 07:16 AM ----------

Did you feel a differences
 
At 108k, you'll feel a difference. Just because your old ones are worn down. I noticed a difference at 45K (lots of city driving though). I went with Denso; but there's not a ton of difference between all the good brands.
 
I have the exact same mpg over the last 8k mi. since the switch. Only difference I noticed was that throttle response got a tiny, tiny bit better.
 
Not sure why. After I changed out the plugs, the car had trouble on cold starts until I reset the ecu via battery disconnect. By trouble on cold starts, I mean pretty bad stumbles for the first 5 seconds of running. The car reeked of fuel and gas mileage was pretty bad until I did the reset.

g0ldm4g3 said:
Why an ECU reset?
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STIBungy said:
Not sure why. After I changed out the plugs, the car had trouble on cold starts until I reset the ecu via battery disconnect. By trouble on cold starts, I mean pretty bad stumbles for the first 5 seconds of running. The car reeked of fuel and gas mileage was pretty bad until I did the reset.
Click to expand...

Indicative that one of your previous plugs was probably bad and the ECU was compensating for it. So after your reset the ECU it went back to factory settings.

The ECU on these cars is very intelligent over time it remembers certain things and can adjust elements within certain boundaries to keep the car running good. I would say after any mods like plenum spacer, intake, plugs, TB cleaning, etc. Do an ECU reset.
 
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