[Sandin]

I need help and I am getting frustrated with my 2008 Honda Odyssey's check engine light that is now coming back up every few months. I have changed my Honda Odyssey spark plugs/coils at least 5 times within last 3 years and I think it might be time to take it in. I spent a lot of time trying to figure out what the root cause of this issue is and I can't seemed to pin point it. I do some work on my cars but nothing major like replacing timing belt, rebuild engine, etc. It seems like back 3 spark plugs and coils are going bad within 4-5 months recently. They seemed oily and dirty.

I don't know if anyone else had this issue before but I would like to give it another shot at fixing this issue before taking the car in to a mechanic next weekend. i need this car for 3-4 more years and I have about 168,000 miles on it.

Currently check engine light is on and both coils and spark plugs were replaced only a few months ago. I change oil every 3000 miles with recommended 5W-20 oil and I changed the oil last week. Used STP fuel injector cleaner a few times this year. Last time van had some idling issues/rough before check engine light came on shortly after. This time it just came on suddenly.

Thanks!

 

[Sandin]

It is a necessity here to specify your trim level.
If you have an EXL or Touring then you are probably experiencing the negative side of Honda VCM technology (hence, rear cylinders fouling up).

Scroll up to the main page of this generation and read up on those VCM muzzler. Basically, you will want to disable VCM with one of those muzzlers ($100) then wait a pray that it will clear up in a few months. Otherwise, you will need a ring job.

I will try that, thank you. I meant to say I have 2007 Honda Odyssey EXL

 

[Sandin]

And what brand coils/plugs? Non-oem can cause issues.
When I had rough idle issues with random misfire code, I did a 'drop test' to find which coil was not firing. Replaced that one coil with a Hitachi. Problem solved

I purchased Denso coils.

 

[Sandin]

Thank you all for your help. I went ahead and purchased /installed VCMTuner yesterday. Shortly after I posted this topic, check engine light went away. When check engine light was on, eco mode did not kick in. So I am hoping that VCMTuner will do the trick. I will update this discussion in a few weeks.

 

[Sandin]

I need help and I am getting frustrated with my 2008 Honda Odyssey's check engine light that is now coming back up every few months. I have changed my Honda Odyssey spark plugs/coils at least 5 times within last 3 years and I think it might be time to take it in. I spent a lot of time trying to figure out what the root cause of this issue is and I can't seemed to pin point it. I do some work on my cars but nothing major like replacing timing belt, rebuild engine, etc. It seems like back 3 spark plugs and coils are going bad within 4-5 months recently. They seemed oily and dirty.

I don't know if anyone else had this issue before but I would like to give it another shot at fixing this issue before taking the car in to a mechanic next weekend. i need this car for 3-4 more years and I have about 168,000 miles on it.

Currently check engine light is on and both coils and spark plugs were replaced only a few months ago. I change oil every 3000 miles with recommended 5W-20 oil and I changed the oil last week. Used STP fuel injector cleaner a few times this year. Last time van had some idling issues/rough before check engine light came on shortly after. This time it just came on suddenly.

Thanks!

VM tuner fixed the issue, no more errors or idling issues.