Yes. Correct.. sparks and coil packs.

switch the coil packs first… see if the issue goes with it…. Then the plugs

 

If it's cylinder 5, then the VCMTuner II is still doing its job - it protects cylinders 1 through 4 from VCM. Cylinders 5 and 6 are not affected by VCM.

I'd suspect the ignition coil too. Swapping the coils from cylinders 5 and 6 is easy to reach and a good place to start. If the misfire switches to cylinder 6, then you know the coil is at fault.

 

If it's cylinder 5, then the VCMTuner II is still doing its job - it protects cylinders 1 through 4 from VCM. Cylinders 5 and 6 are not affected by VCM.

I'd suspect the ignition coil too. Swapping the coils from cylinders 5 and 6 is easy to reach and a good place to start. If the misfire switches to cylinder 6, then you know the coil is at fault.

^^^ This

 

I don't think that I need to go through the swapping test process.

Starting with taking the coil packs off of cylinder 5 and cylinder 6. Cylinder 5 appears to have some corrosion going on.

Looking inside the coil pack, the spring is missing. That' can't be good.

Luckily I have a scope to look inside the cylinder.

Cylinder 6 - looks good to me.

Cylinder 5 - am I screwed?

 

is that an optical illusion or am I seeing threads missing?

 

cylinder 5... my guess is the camera view.

did you try the coil swap?

 

No. I don't have to. I see that the coil pack is bad. The spring is missing in the bottom. My concern is the debris in the cylinder. Will it cause further problems?

 

new coil pack. clean up the spark plug and call it a day.

You may need a spark plug as well.

 

new coil pack. clean up the spark plug and call it a day.

I hope so!

You may need a spark plug as well.

I guess I will see when I take the plug out!

Thanks for the feedback!

 

What did you use for spark plugs and where did you buy them? What brand of coilpacks did you use and where did you buy them?

The oil you see in that scope picture is not in the cylinder - that's just the spark plug tube. I would guess the spark plug isn't fully seated.

I'd say:
6x new OEM coils
6x new NGK spark plugs (from dealer, Rock Auto or local parts store)

It sucks that you replaced the OEM coils when you did - they are generally very reliable.

-Charlie

 

What did you use for spark plugs and where did you buy them? What brand of coilpacks did you use and where did you buy them?

The oil you see in that scope picture is not in the cylinder - that's just the spark plug tube. I would guess the spark plug isn't fully seated.

I'd say:
6x new OEM coils
6x new NGK spark plugs (from dealer, Rock Auto or local parts store)

It sucks that you replaced the OEM coils when you did - they are generally very reliable.

-Charlie

I still have the OEM coil packs. I'm getting a new NGK spark plugs now. Just 1 for now to make sure I can get it back to and running.

Why do you suggest all new equipment? Just good practice?

 

You should be fine from a parts store. Maybe not the cheapest prices, but you'll definitely get what you want. I bought 4 plugs for my Accord from AutoZone at about $15 each.

 

Finally finished the replacement of the #5 spark plug. Reinstalled the OEM coil pack. Took the car for a short ride all appears to be well. Thank you all for your help. I hope this is it forever! (Or at least a while.)

@phattyduck, I will price out a replacement set of spark plug and coil packs. I have bought from Rock Auto in the past, I believe that they have the best prices out there.

 

I have this issue currently. I replaced spark plug and Coin in Cylinder 5. 2011 Odyssey.

I switch the coil and spark plug but I still get misfire on same Cylinder 5. Does it mean the plug not getting power from the bottom where it screwed down to?

 

Awesome. Finger crossed it was a cheap and permanent fix for you

 

I’ve been reading a lot of the posts about the piston ring/misfiring issues on the Odyssey’s. Unfortunately I found this site after I paid the $3300 to have the issue “fixed” about 2 years ago, and of course the misfiring has happened a few times since. The van is currently at the dealership that says that it’s out of warranty and HC or the dealership are not even considering any kind of good will help. I’m not giving any of them another dime! I think my service advisor will replace the spark plugs and any minor issues without charging me. I have read many threads that suggest at this point that I should have a VCM muzzler of some sort installed. I know that you have recommended the VCM Tuner II. Any suggestions on where to buy a legitimate one and what kind of shop will install it? My Midas guy says he’s never heard of a muzzled and isn’t comfortable installing one…

 

I have read many threads that suggest at this point that I should have a VCM muzzler of some sort installed. I know that you have recommended the VCM Tuner II. Any suggestions on where to buy a legitimate one and what kind of shop will install it? My Midas guy says he’s never heard of a muzzled and isn’t comfortable installing one…

If you can unplug and re-plug an electrical connector, you can install basically any of the "muzzlers" out there, no need for a mechanic.

-Charlie

 

I always chuckle a bit when I see people say they they won't buy another Honda simply because of VCM.

Suit yourself, but I'd be happier with a muzzled Honda V6 (or even better, one of the Honda V6s without VCM like the J35Z6) than whatever Toyota pushes out.

If you had muzzled from day 1, you'd have zero issues.

 

I always chuckle a bit when I see people say they they won't buy another Honda simply because of VCM.

Suit yourself, but I'd be happier with a muzzled Honda V6 (or even better, one of the Honda V6s without VCM like the J35Z6) than whatever Toyota pushes out.

Very interesting perspective and I appreciate the feedback / comment. Outside of the VCM design issues, are you saying that the engines on a Honda are more reliable than Toyota? Do the newer Honda V6s still have the VCM issue or was that resolved in new generations of the engine?

If you had muzzled from day 1, you'd have zero issues.

Probably and I'm grateful that Honda acknowledges "an issue" and does 1 fix, but it is a temporary and the failures have occurred again if not muzzled. You have to dig a bit in order to be aware of this ongoing issue and fix it permanently. I was not aware of this until the failure occurred in my vehicle. I share my VCM experiences with anyone that has a Honda. I always tell them to check online to see their vehicle is affected.

 

The 6 speed in my 2015 EX-L is wonderful after the software update. Because my miles were so low, I only did one drain & fill so far. My 2002 got a drain & fill every other oil change from when I bought it around 36k to when I sold it at 256k.
The only issue I ever had was a shift solenoid. I just downshifted and then shifted up for a few days and it never happened again. Never replaced anything but fluid.