Brief flashes of 'check engine' light are not a good indication of a problem as would be staying on for 10 sec or more. And tha's what the cealer may tell you.
If you have less than 50,000 miles and his check indicates problem with coil packs its a warranty item because it affects emissions.

 

Took it in, they found and replaced one bad coil pack. Problem is still occuring so there is probally another bad coilpack in there somewhere. Going to call them on tuesday and have to take it in again. Fortunatly its still under warrenty.

 

It sounds to me like it is time for a transmission fluid change and new filter. I had the same problem in a G.M. product. It is trying to shift down a gear. Try driving a gear lower at the same R.P.M. and you will see that it doesn't do it if I am right.

 

They finally replaced all the coil packs and the problem seems to have cleared up *knock on wood*

 

I have the exact same problem on my 07 FitS (AT), but i am at 60k miles.
I thought it was the Trans Fluid being low or some thing and did a Changed the ATF fluid but that did not solve the problem, so i decided to take it to the dealer since it still under warranty.

They ran a diagnostic on the engine (cost me 175) and told me that the "ignition coil was misfiring and needed to be replaced (covered in warranty)"
i am guessing that your coils need to be swapped out as well.

is this an easy DIY?

 

i'll make sure to keep an eye out for this problem when I drive my fit again so the dealership can fix it before i pick it up... thanks everyone!

 

Over the years we've had our share of customers complaining of hesitation in their driving. The great majority of solutions were ignition related: bad spark plug, bad ignition wire, bad distributor points and/or contacts, and lately spark plugs or coil packs.
hate to say it but coil packs have to be the most negative improvement I've seen in automotive engineering in 50 years. I think the damn things are not very good even brand new and certaily after 30,000 miles. And cost way too damn much.
If replacing the spark plugs and coil pack(s) don't cure hesitation then suspect the ECU. We really haven't seen much of a problem from sensors; any problem from those have generally been more serious and easier isolated than intermittent ignition firing. Its easy not to be picked up on OBD either simply because the intermittent just isn't consistent enough to register. Bad gas of course can be a culprit by not being as easily ignited as good gas but thats usuably consistent enough to register. Its also a good reason the clean up deposits in the combustion chamber including the spark plug with a good non-alcohol injection cleaner once month. Wally World's cost about a buck and is an inexpensive maintenance item.

 

I have asked about what kind of transmission, octane rating of fuel, driving style and conditions the drivers with coil pack problems may have in common.... I can't help but think that high under hood temperatures could be a contributing factor in the failure of coil packs.

 

I've replaced all the plugs and all the coil packs and still have the same issue. High underhood temperatures at idle seems to correlate. The scanguage shows 108F or higher on the induction air reading when it happens. If I see higher than 108, I expect them to show up 95% of the time.

 

Induction air is inflow to the manifold, correct?. With hood closed and warm summer day that isn't unreasonable.
Check your ignition wires
Check your throttle position sensor
Check your intake air temp sensor
Check your ECU

 

It's the air being drawn into the intake manifold under the hood. Ambient seems to need to be over about 60 degrees. The best way to get it to happen is to drive it until the engine is nice and hot and then park it out of the wind for about 20 minutes. Then it often does it as soon as you start it back up.

The question I have is: What else would malfunction due to high temperature? Electrical, fuel, emissions, vacuum?

 

I've experienced this only once in our '07 - is there any aftermarket coil option available yet??

 

I'm experiencing the same problems.. anyone car to let me know if you problem was resolved? And the cost to resolve it? My warranty ended...

 

If the coils are not getting enough voltage the ignition dwell time is not long enough for them to produce a strong spark..... If they receive too much of a charge they will overheat and fail prematurely.... The ECU controls the amount (rate) of charge to the coils based on charge voltage and RPM.... The factory ECU settings are for the stock coils, after market coils may require a reset of the ECU for proper dwell.... At high RPM the dwell time is shortened and if the coils weren't get a proper charge would cause the same type of misfire as would occur with too much spark plug gap but shouldn't cause idle miss fire..... It seems to me that the coils that are failing is due to shorter dwell time from too much current causing the premature failure.

 

I've had the stutter/rough idle issue, it was coil packs and a valve adjust that made it all go away. It took about a year to figure it out. I would suggest a shorter interval for the valve adjust, as an out-of whack valve will make the ECU operate the coil pack out of spec and likely burn it out. I'm gonna get my next valve adjust at a 50k interval instead of 100k. Cost me less than a new set of coils.

2007 Silver Fit Sport MT (150k this week!)

 

It seems odd that valve adjustment could affect the coils but there is a lot of things I am learning about the workings of an engine with an ECU..... I am beginning to understand how what you are saying works and it has to do with my post above yours in reference to ignition dwell but I could not see how the valve adjustment would affect the dwell but the spark is timed by a sensor that is triggered by the camshaft and the dwell time is controlled at the ECU and it is all crazy..... I haven't slept and I'm a little bit too confused to explain it right now but it was starting to make sense....I hear you and will do a valve adjustment soon.

 

I was having both a stutter and a rough idle/stalling problem. the coil pack replacement made the stutter go away (got so bad I couldn't drive it) but the rough idle and stalling continued. After I got the valve adjust the stars aligned and my car ran like new. Seems like the two problems were getting worse in tandem.

 

Two days after replace ALL my coils, so far the stutter is gone.

Previous symptoms were hesitation/stutter during idle (about every 5-10 seconds) also around 55mph on incline highway.

 

Has this only been happening on A/T cars?

 

just hopped on this thread my 07 fit 48k miles M/T does the same as well but its rare, usually cruising from 60-68, after 68+ it hits vtec and doesn't do it that often, i felt like it was a gust of wind, be that i do have a roof rack. i wasn't sure if that was the case. like some of the other guys here said, no change in RPM, just like a hiccup.