So I can't find anyone putting this info on the forum... Darn me and my ability to use search function lol I hope this helps those who chickened out because of what people said about intalling spark plugs on GE8. I know u have to "feel it" a lot of things but it's really easy if u have a basic knowlodge about changing spark plugs.

Disclaimer: U r ur own doing it! I'm just telling u how it can be done

Anyway, u will need:
1.4 Denso IK22 spark plugs (I paid $32 shipped)
2.10mm socket with 4" extension
3.Traditional 5/8" spark plug socket with 8" extension
4.Strong back (I'm serious...)



Here's how it looks like under the hood if u never opened it



We are going to use this "little space" left side of the engine and top of the oil cap to access the spark plugs. (Trust me, it's more than enough room to access )



Room behind the engine (see? enough rooms! )



This is how it looks like from the back



More detail pic of it



1.First, disconnect the battery with 10mm socket

2.So here comes the blind work. Use the same 10mm socket with 4" extension to remove the bolt that's holding the gray color spark plug coil. This is where u have to take ur time looking for the first bolt. They are away from u which means far right side of the gray spark plug coil. There's only 1 bolt holding each coil and they r not really tight so it can be removed very easily.

Going in!!!



In this pic, the gray square thing is the coil and the blue thing is the connector that we have to remove later. The bolt can't be seen from the pic because it's on the otherside of it.



Here's a pic of the bolt (it's color coded red)



3.After removing the bolt, disconnet the blue thinggy that u saw on last pic. By doing it, u have to press from the top of the blue thing and u will hear a click. And then slide it away from the coil to remove it. The blue connector doesn't go anywhere since it's mounted so don't worry about it for now.

4.Remove the gray spark plug coil. U kinda have to spin left and right as u pull it to make it easy to come out.

Here's how the coil looks like.



5.Using the traditional 5/8" spark plug socket, remove the old plug. That 8" extension is perfect for the space we have.

Going in again!!!



Here's the NGK stock spark plug that's hiding 2 HP :P.



6.Make sure u put some of those sprak plug grease thinggy on top of the spark plug. (sorry I don't have a pic of them) Put the new IK22 into the spark plug hole. Ur spark plug socket should have a rubber ring inside to hold a plug. Use the torque recommended by Honda. (I don't really use a torque rench on stuff like this since I know how tight it should be by hand: not recomended lol)

7.Put the gray coil back. Again spin left and right while u push them into the hole. (Sound dirty )

8.Connect the blue connecter to the coil. Make sure u hear a "click". And check if it is secure.

9.Put the bolt back in. Again use the torque recommended by Honda.

10.Repeat step 2~9 3 times.

11.Check everything is secure

12.Connect the battery back and tight using torque recommended by Honda.

13.Check nuts and bolts again after a while (I did about a month after)

Thoughts: It is just time consuming and gets pretty frustrated after a while. Also, if u have a bad back like me, it WILL hurt like hell after 10 mins since u have to "hug" the engine for 30+ mins... But take ur time and try to do the hardiest one (far right one) first and u will realize that it's not that difficult to change. Please let me know if u have any question.

 

Hahaha great DIY! I did this with Zex cold plugs. Most people took off the cowl (which makes it easier, but much much much more time consuming). You're the only other one that I know of that did it without removing the cowl. If people can "do it blind" I'd highly encourage everyone to follow this DIY. Very nice.

 

LoL yeah, I asked my friend who's a Honda tech and he said "I ain't gonna waste an hr removing half of front end to do $50 job..." And told me how Honda dealers do. It make sense for the dealer doing it this way to save time and money. I don't have many pics because I did it like a month ago and today I just checked nuts and bolts to see if they are okay and decided to take some pics .

 

i think putting deno's is a waste...lol
what are the OEM plugs? haha...thats sweet the FIT has coilovers?

 

oh cool i never knew our stock sparkplugs were NGK IR, can you see what gap those stock ones are?

 

I do not believe plugs will get you 2HP,
I wave the BS flag on that

 

According to this article (which doesn't necessarily make it true) you may be able to gain by changing plugs.

Project 2009 Honda Fit - Denso Iridium Spark Plugs - Honda Tuning Magazine

 

Its impossible to dyno a 2hp gain or loss considering that is well within the margin of error for a dyno. You can dyno in at 100whp, put on a hat, then 10 minutes later do another dyno and you might see 102whp, or even 98whp.

When I need to change my plugs, ill be giving you a call bro! No way im trying that, I dont have patience for that. Did you feel any honest difference with the plugs?

 

i wouuld say with an intake and a downpipe you gain more then plugs, but thats expensive
this car is not really meant to be a sports car...get an S2000!

but really, maybe 2hp when the engine is cold won't do shit lol
run 95 octane that might give u the same results lmao

 

Nobody is arguing your first statement. This is just a guide for those that want to change their spark plugs as there have been lots of talk of how complicated it is.

This car is not a sports car, but what is wrong with people modding it for the fun of modifying and personalizing car. I had an S2000 and it was just as fast as the Fit under 6,000. You have to rev the shit out of it just to get it moving.

Theres nothing wrong with wanting to make a daily driver run faster, smoother, better, and last longer.

 

Thanks for the DIY. Anyknow what the recommended torque is for the plugs?

 

I understand that but people need to be realistic when stating performance upgrades on your vehicles

 

I did it because I have better experiences with Denso than NGK plugs, and read article that it helps to run engine cooler. If u think this is a waste then don't bother changing them. I did this to show people that it's not difficult as what people says to change spark plugs on GE8... Seriously, how come I get all these hacklers everytime I start something...

 

dont worry jkskrn i thought your dyi was very useful for my future ik22 install. keep up the good work and let us know how your 1/4 mile times are coming along.

 

Sure dude, hit me up anytime, I'll do it for a couple of beer and a pack of cig lol Well, I didn't feel anything until I started filling up with premium gas. I had premium gas before without these plugs, and wasn't really this responsive. I think these plugs works better with premium gas. And works so much better with PRM intake & HKS exhaust for sure.

 

i have changed plugs in my 240sx and in my rx7 and have felt the difference but it isnt really more power it normally runs smoother and just feels like it isnt straining to run. honestly when this summer starts ill be doing this swap

 

Thanks Yeah, I felt so bad not going to the track last night But I will def. go tomorrow so I can break the 17 sec wall

 

there's also issues running with denso's in the long run, your can end up running rich or cooler or warmer

if the FIT originally comes with iridiums I don't see it being a problem,

here's a review of a guy running IK22s on his volvo

Denso Iridium Plugs

 

instead of denso is there an ngk plug that works?

 

I should go to the track with you one day. My cars stock except for a K&N filter, but its a 5 speed. So I'm curious to see what the difference is. Although I'm always so easy on my car I'm afraid of running it hard. I never go past 4,000 rpm. Plus I live an hour away from bithlo over in BVL.