I know based on a lot of the talk here coil packs need to be replaced around every 80 miles or so but this is not outlined in the 08 Honda Fit manual. Recently I had experienced some misfires -- had to replace spark plugs -- then a little misfire came back, no codes this time but did valve adjustment. Runs good but not perfect as before so I switched to mid grade gas and guess what runs much better and now I will use premium next time.

So I like to throw this -- safe to assume that most who bought the 07/08 Fit (and ended up replacing coil packs) they used regular octane gas (87) -- however can using premium gas help not degrade the coil packs -- i.e. is there any co-relation between quality of gas and coil packs? For me (car already at around 147,000 km) I havent replaced coil packs but it looks like changing octane level of gas is helping (no misfires have come back). Can there be any sense to this or am I wishful thinking?

 

I bet you mean every 80K miles. Well, I'm in the US, my '08 Sport presently at 124K miles and still on the original coil packs.

Replaced the original plugs with Denso IK22's at 113K and noted the condition of the coil packs - they looked great. I'll wait until one coil pack goes, and then replace all four myself with the Hitachi OEM coil packs from rockauto at around $54US apiece.

I don't have any problems with misfires. I would think misfires would generate codes and would not necessarily be related to coil pack issues. I'm sure others here will weigh in.

 

Yes I mean 80K miles. Good to know a fellow 08 Fit on original coil packs :-)

What type gas do you give it?

 

132k on original coil packs
Has seen plenty of 87 but for the past few months it's been 93 since swapping in the ik22's.

 

I'm running regular 87 octane here in the states, which is up to 10% ethanol. When I take cross country trips, I sometimes have access to non-ethanol gas which is nice, but that's the only break I give it from the normal stuff.

 

Have you found a difference since switching to 94?

 

I mean 93.

 

Our '07 Fit is at 110K miles on the original coils and plugs. <----JINX

 

Encouraging! Btw what type of gas do you feed it reg or prem?

 

I'm on the original coils at 60k miles with an 07 Sport MT. Ill change 'me with Hitachi's when i start getting misfires. I run the shitty ethanol crap we have in Quebec and still doing fine.

 

I bought my Fit at 52K and I doubt the dealer changed them out then. I've got about 92K on it now and yet have to replace them. No codes so far. I'll probably replace them when I hit 100K.

 

08 with 164k on 87 octane. Adjusted valves at 110k and put in Denso IK22's. No misfires yet.

 

Regular 87 octane, 10% Ethanol, which is the only kind available in our metro area.


PS: I adjusted the valves once @ 62K miles, and will prob check them again next summer. And, I'll install new Iridium plugs next year, too.

 

Butt dyno shows a slight improvement but I don't really know.

 

105600km and same plugs and packs. I am procuring replacements

 

I have an 07 with 170k and original coil packs.

 

use of premium gas will not affect coil paks ut can affect the power and easier ignition of spark plugs. see what happens the more you use premium.We see coil paks failing at 45 to 110k miles, most around 70k.

 

Got some new OEM coil packs for free (long story) and have 114K on the originals with no issues. Not sure if I'll swap them out or not...

 

Thanks, so far so good with premium! Looks like premium for life -- as long as Fit for life :-)

 

Also just passed my emissions test WoooHoooo!