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Help! No compression cylinder #5

5260 Views 260 Replies 11 Participants Last post by  undivide
Ok so any help here would be great. I'm a single mom, with a 2011 pilot. Always kept up with maintenance, oil changes ect. Yesterday I went to merge onto the highway and instantly my CEL started flashing and I could tell it was misfiring. Drove it to my mechanic, they read code amd said misfire on 5...they replace cpil and plug and the misfire would move around. (Not sure what that meant). I left the truck there. Today they said they did a compression test and all cylinders are good, except 5 has no compression at all. And bc there a small local shop there trying to figure it out and the next step is to check if my rocker is broken. Does this sound right? I'm so confused bc I all hear is $$ and being I just paid off my daughter's college bill I'm broke!!! Also to note it smelled slightly of antifreeze when he opened my hood. Although it never over heated and never has in the past. No rough starts ect..no riding different or funny sounds. The only sound I heard over this past month was a squeeling noise from what I assumed was my serpentine belt. Not super loud or crazy just mildly. Any suggestions??
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Yeah, I love Eric O. at South Main. Always watching his videos. Very honest mechanic. Would love to see your Pilot make one of his videos.
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damn, 2 hours away from probably the best mechanic in the "PRNY" :ROFLMAO:
I KNOW!!!! I LOVE HIM!!!!
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I KNOW!!!! I LOVE HIM!!!!
Been driving for 30 minutes. No cel. I have another SUPER STUPID QUESTION
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Been driving for 30 minutes. No cel. I have another SUPER STUPID QUESTION
I always use 89 gas. The manual says to use 87. I just have always ran 89. Now that I've had motor work done should I just stick to what the manual says? And use 87
What do you all use? I'm sorry if this is a stupid question I just don't want to hurt or damage anything else
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Also I mentioned the vcm muzzler to.my mechanic he chuckled and said "stay off thr internet "....soooo he's obviously not for it. Oh well I am
My neighbor offered me his that he had, but it has a resistor?? I am ordering the one I can put on myself, zip tie down, and not ever monkey with.
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I always use 89 gas. The manual says to use 87. I just have always ran 89. Now that I've had motor work done should I just stick to what the manual says? And use 87
What do you all use? I'm sorry if this is a stupid question I just don't want to hurt or damage anything else
There is no benefit to using >87 on a stock Pilot, even before you had the engine work done. With that said, the only thing you're hurting by using 89 is your wallet, it's not going to damage the vehicle at all.

I always use the recommended spec. For my old Nissan Maxima, it said 91 octane was recommended, but 87 would work, so I used whichever one I felt like. For my Odyssey and my Accord I use 87 since 87 is recommended.

Also I mentioned the vcm muzzler to.my mechanic he chuckled and said "stay off thr internet "....soooo he's obviously not for it. Oh well I am
My neighbor offered me his that he had, but it has a resistor?? I am ordering the one I can put on myself, zip tie down, and not ever monkey with.
Sounds like your neighbor has one of the passive models, so yeah, not for you if you don't want to ever touch it after installation.
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Guarantee you Eric O would probably have this thing solved quicker than it would take to get to him...
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alright we got ourselves a Hondoo here. It's the Pilot, it's got the big three five, and the money light is on! :love:
-vcm muzzler is the old term used before the newer type devices started showing up that "automatically" adjust to maintain a certain temp tricking the ECU to keep ECO off.
89 would only really be needed if you were doing heavy towing with the Pilot.
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damn, 2 hours away from probably the best mechanic in the "PRNY" :ROFLMAO:
Wonder what it would cost to tow it there and back? I can't be the on
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Telephony Telephone Fluid Communication Device Gadget

I spoke too soon I'm now getting cel light p0306 code
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Wonder what it would cost to tow it there and back? I can't be the on
Probably a lot, Jamestown is over 100 miles away from where they are.
Also I mentioned the vcm muzzler to.my mechanic he chuckled and said "stay off thr internet "....soooo he's obviously not for it. Oh well I am
My neighbor offered me his that he had, but it has a resistor?? I am ordering the one I can put on myself, zip tie down, and not ever monkey with.
That is because your mechanic is not a Honda mechanic, and it is extremely rare to find a mechanic that knows everything about all makes and models. That is why I suggest finding a Honda specific mechanic. Even a Honda specific mechanic isn't going to know every single quark about Honda's since each generation is slightly different, and even years within each generation has differences, but at least they will be way more well rounded than the guy that "specializes" in all makes and models.
It is obvious your mechanic doesn't know about the damage VCM does to our engines. I would seriously drop your mechanic and find one that is passionate about Honda's/Japanese vehicles.
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The way octane works is the higher the octane the higher resistance to detonation. Some engines have high compression and atomized fuel will combust without spark under the right pressure. High performance engines have higher compression and using a lower octane fuel such as 87 can potentially cause the fuel to combust before the spark plug sparks, and again once the spark plug sparks, and now you have 2 detonations and 1 before the other, and this can cause damage to your vehicle.
Our vehicles are not high performance, high compression engines, and so 87 octane is recommended. Anything higher is a waste of money.
Fuel companies took advantage of the fact that we don't know anything, and so they used words like regular, premium, etc... to label the octane rated fuels, and this tricked people into using higher octane fuels. When in reality, most engines are tuned to run on the lower octane fuels.
I personally use non-ethanol fuel that is 89 rated by my local Sinclair (top-tier) fuel station. Just because it is about a block away and I don't trust ethanol fuels. The owners manual says it is rated for up to 10% ethanol, but I would rather not put it through my vehicle unless I have no other choice.
What is more important than octane level is where you get your fuel. Top Tier gas stations are a must if you don't want fuel to cause issues.
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I spoke too soon I'm now getting cel light p0306 code
at least it's only one cylinder to narrow down. it could be very possible that something was left unplugged.
when my Pilot was at the dealer to "diagnose" the random misfires my wife inadvertently gave them permission to tear down the top end and do a valve adjustment. I'm not sure why but they left a couple of the fuel injectors disconnected when I called them up and said STOP put everything back together DO NOT do anything else.
luckily you can shine a light in and check cylinder 6's injector harness connector maybe even feel if it's clicked tight or loose. coil connection is easier to check as it's right up front behind the radiator fan.
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damn, 2 hours away from probably the best mechanic in the "PRNY" :ROFLMAO:
Wonder what it would cost to tow it there and back? I can't be the on
That is because your mechanic is not a Honda mechanic, and it is extremely rare to find a mechanic that knows everything about all makes and models. That is why I suggest finding a Honda specific mechanic. Even a Honda specific mechanic isn't going to know every single quark about Honda's since each generation is slightly different, and even years within each generation has differences, but at least they will be way more well rounded than the guy that "specializes" in all makes and models.
It is obvious your mechanic doesn't know about the damage VCM does to our engines. I would seriously drop your mechanic and find one that is passionate about Honda's/Japanese vehicles.
The only really honda specific mechanic I can find close to me is the actual honda dealership. I've had so many mechanics try to rip me off, the one downside to being a female is they assume your stupid.
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So I guess he cannot get it back in until Monday
I have the same cylinder 6 code every 20 miles or so. He said the machine shop should've did the valve adjustment, but he's going to check #6 to makesure it was adjusted properly. Is that possible to just check one?
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I'm riding around with my 20$ code scanner and keep resetting the cel light. Should I not drive it? It performs nicely and rides good. I noticed a slight rough idle, that probably isn't noticeable to anyone but me. And call me weird but I gassed up had 135miles, and within 5miles the gas said 117 miles. Hmm
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I'm going to give him this last week, amd then I'm thinking about just going to honda, or another shop I researched.
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Is that possible to just check one?
Yes.

I'm riding around with my 20$ code scanner and keep resetting the cel light. Should I not drive it? It performs nicely and rides good. I noticed a slight rough idle, that probably isn't noticeable to anyone but me. And call me weird but I gassed up had 135miles, and within 5miles the gas said 117 miles. Hmm
One light misfire may not hurt too bad, but the problem with driving while misfiring is that it can result in unburnt fuel getting sent through the exhaust, which can ruin the catalytic converter over time.

But I think you should be good at least temporarily.
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