How to Change and Gap Spark Plugs on a Focus ST! 

just normal ratchet. technically should torque them though

they’re step one colder plugs. i can tell it’s pulling timing by the ignition correction on the accessport going into the negatives

Most of the time I would watch your ignition correction on Cylinder 1 and 4 and if you are getting any negative corrections that would be pulling timing.

i would stick with what oem calls for unless you are tuned. probably motorcraft iridium plugs if you have stock tune. i use ngk 6510 because i’m tuned and need step colder plugs

Do you need 2 step colder if your slightly tuned got a dreamscience imap on. its ots tune pushing about 270 bhp that's crank horse power not whp I've got iridium plugs in got stock every thing else 2015 st cheers

I’m a little late to reply but NGK 6509 is the correct heat range for the focus on stock tune

@@blackhawk3456 ok 👍 thank you

Check the emissions decal inside your hood.

Always cold

@@philspaghet - Yup - figured so - no issues, removal & install took about 20min + 2 cold beers. Submerged the rubber coil boots in silicone spray & applied dielectric grease to boots & top coil wire plug. Probably should have replaced all 4 coils - maybe this coming fall.

yeah i’ve been told in some cases it isn’t something to worry about but i’m not too sure how to fix that. i had some issues with too much e85 so i’ve been putting less e85 in and it’s been working out much better. check your long term fuel trims and oct adj ratio to see how the fuel is doing

A little negative corrections is okay. If you are seeing more than a 2.00 at WOT all the way I would lay off of it and speak with your tuner.

not from what i can tell i don’t have knock count on on my accessport. if the blend is right there should be no issues

i never delete comments. sometimes youtube filters them and they don’t go through

That’s a stupid reason to unsubscribe from someone 🤣