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Discussion Starter · #1 · (Edited)
Good Morning,
A Few days ago I bought a 2010 Honda Pilot.
To begin with the truck has about 178k miles. when i started the truck the first time it was smoking a lot.
The first thing I did is change the spark plugs and coils since there was a misfire.
the previous owner told that cylinder 1 and 4 has new plugs already, so i started with nr. 2 and here is what i found:
136541

the next plugs were not as bad, after replacing all plugs i started the truck and i was SMOKING a lot (grayish smoke)
i decide to flush the engine, after i did that i replaced the engine oil and filter.
But once i opened the oil cap i realize the inside was VERY dirty,

So i proceed to open the valve cover and might as well adjust the valves.
136542


The valve covers did not look good to say the least,
but i cleaned them
136543


So after i adjusted the valves I put everything back together, the truck was making less noise,
however the smoke remain.the net day i decided to take her on the road for a test drive,
i reset the codes start the truck that was smoking for a while, after a few minutes looks like it's a normal smoke.
so i drove it for few miles, NO CHECK engine however after about 5 miles the truck loose power, check engine came on with p0300, P0301,P0302, P0303
once i let the truck cool off and i start it back there is a lot of smoke!


basically
The Spark Plugs are new (BOSCH)
The coils are new (i'm not sure about the brand since the previous owner bought them before selling the truck)
The Valves are adjusted.

As far as i know the timming belt has NOT been replaced, could it be the issue since the misfire occur only with cylinder 1,2,3 ?
I'm not familiar with the VCM System, but is there any chance that this is the issue?

I really appreciate any help
 

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Good Morning,
A Few days ago I bought a 2010 Honda Pilot.
To begin with the truck has about 178k miles. when i started the truck the first time it was smoking a lot.
The first thing I did is change the spark plugs and coils since there was a misfire.
the previous owner told that cylinder 1 and 4 has new plugs already, so i started with nr. 2 and here is what i found:
View attachment 136541
the next plugs were not as bad, after replacing all plugs i started the truck and i was SMOKING a lot (grayish smoke)
i decide to flush the engine, after i did that i replaced the engine oil and filter.
But once i opened the oil cap i realize the inside was VERY dirty,

So i proceed to open the valve cover and might as well adjust the valves.
View attachment 136542

The valve covers did not look good to say the least,
but i cleaned them
View attachment 136543

So after i adjusted the valves I put everything back together, the truck was making less noise,
however the smoke remain.the net day i decided to take her on the road for a test drive,
i reset the codes start the truck that was smoking for a while, after a few minutes looks like it's a normal smoke,

so i drove it for few miles, NO CHECK engine however after about 5 miles the truck loose power, check engine came on with p0300, P0301,P0302, P0303

basically
The Spark Plugs are new (BOSCH)
The coils are new (i'm not sure about the brand since the previous owner bought them before selling the truck)
The Valves are adjusted.

As far as i know the timming belt has NOT been replaced, could it be the issue since the misfire occur only with cylinder 1,2,3 ?
I'm not familiar with the VCM System, but is there any chance that this is the issue?

I really appreciate any help
VCM operation will foul # 3 and 4 plug. I would definitely want to install a VCM disabler.
But what I really think the engine needs is to replace is the VVT solenoid assemblies on both sides. These control timing and if they've never been replace, they can cause lots of oil in the cylinders.
If you really want to do a complete job, I'd buy both sides, the complete VVT solenoid and spool assembly.
I used part # VVT237 and VVT282 made by Standard Motor Products. Pictured here. The lower priced WVE was not available when I did mine. This job requires removing the valve covers and rocker arm assemblies to remove spool. I used Black Permetex to reseal the spool to the head instead of Honda Bond. That was 50k miles ago and the 240k mile engine is still running smooth.
136544

There is a 5% discount code on this site somewhere.
 
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That engine needs rings, the oil control rings are stuck. Usually it's just cylinders 1-3, if #4 plug is dirty, #4 needs rings too. Replacing the spools valves won't do anything for you.
 

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That engine needs rings, the oil control rings are stuck. Usually it's just cylinders 1-3, if #4 plug is dirty, #4 needs rings too. Replacing the spools valves won't do anything for you.
I'm looking at replacing the VVT components as maintenance (If it hasn't been done). The spool comes with it. But yes, more can be wrong. A compression check or even a camera dropped in the cylinders to look for scarring would help determine if you want to spend the money to fix bad piston rings.
 

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Spools valves aren't a maintenance item, they rarely fail. They won't have any effect on your burning oil issue.
 

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Spools valves aren't a maintenance item, they rarely fail. They won't have any effect on your burning oil issue.
Many part manufactures sell the spool as a complete unit with the VVT (Honda only sells as a complete unit). You got the valve cover off..., I'm replacing it all as maintainace. The spool can eventually begin to leak in time. I'm sure the OP doesn't eventually want oil dripping into his alternator. All I can say is after I did the complete job, my engine smoothed out, the loss of power fixed, no more black spark plugs and my oil consumption became negligible. Yes, I agree with you, the spool has nothing to do with burning oil.
 

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Your correct the front one usually will eventually leak and cause alternator failure. The op has a base engine problem, putting more parts on it is a waste of money if he isn't going to fix the root cause.
What else did you do at the same time as spool valves? Valve adjustment perhaps? Valves out of adjustment effect all the issues you say were correct with the "service"
 

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Discussion Starter · #8 ·
Update:
I checked the compression and CYLINDER 3 had about 130psi whereas all the other onces had 200+ psi.
so i did my "magic", i used an old timer method i put some diesel in the the Cylinder 3, let it sit and the next day i checked the compression and guess what! 200psi.

So the engine HAS GOOD COMPRESSION, I replaced the oil with a new one, then flushed the engine once again,
replaced the oil once again with a new filter.

So the truck is still smoking, however after few minutes the truck don't smoke anymore but when i turn it off and ON after few minutes it smokes in the beginning but then stops smoking.

I drove the truck trying to NOT let the ECO mode kick in, I was able to drive about 5 miles without the check engine and then while i was stopping at the red light, check engine came ON with cylinder 1,2,3...
Could it be the VCM/ ECO mode causing that?

i just ordered the "VCMTUNER II - Advanced" and I really hope that will help.

So basically compression is good,
plugs are new but a little black
coils are new
valves are adjusted
oil/filter new
 

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Discussion Starter · #10 ·
You checked likely check wet compression, what is your compression now that you have drivin it?
HI compression is "acceptable" on cylinder 3 i checked and it's 190+psi compare to the other onces that have 200
 

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Discussion Starter · #11 ·
BIG UPDATE TODAY:
so I find some time to mess around with the pilot,
First of all I installed succefully the VCM MUZZLER II, works great no ECO mode anymore, surprisingly less check engine light,

So when i start the truck I still have a discent amount of smoke,
I drove the truck for a few miles(But more than "usually" ), I must admit i really press the throttle, anyway so I had misfire on cylinder 1,2,3 and P0300 random misfire... I came back home double moved the spark plugs from cylinder 1,2,3 to cylinder 4.5.6 and vice versa, same with the coils.
so anyway i reset it, drove with less than 3k rpm to see if it comes back IT DIDNT FOR few miles and once i pressed full throttle again the truck start to jerk and CHECK ENGINE start to blink, loss of power etc... and misfire on cylinder 1,2,3 So now im sure that there is nothing wrong with the coils and the spark plugs!(which are technically Brand NEW)

what's funny is that the fact that i can really push the truck to the limits for a few minutes up to redline and Noproblem and all of the sudden when i try to accelerate the light comes back on;

During my last "test" when the check engine light came back it did with the VSA and triangle light, i pull to the side, and put it in Park however the engine was running at 2k RPM! I pressed slightly the throttle and it went all the way to 3K and the smoke start to come out from the exhaust! i immediately stopped the truck,
restart it and it smoked at start so i drove away a little and stopped it, reset the check engine and drove back home without any problem for few miles, i even went all the way up to 6k rpm, the light didn't came back...
I let it sit for few minutes, once i start the truck i had some smoke coming out of the exhaust and stopped after a while.


What should be my next step?


thank you!
 

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It seems as though you have more then 1 issue.
I have had many issues with non ngk/denso plugs causing noise in the crank/cam circuits, resulting in stalls, missing, and no starts. I would get the Bosch plugs out and ngk/denso in to eliminate those as an issue.
The burning oil is 99% caused by coked oil control rings, usually takes a screw driver and a little tap tap to get then out of groove. The other thing that can happen due to vcm is that all the ring gaps line up and pass oil.
 

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Discussion Starter · #16 ·
It seems as though you have more then 1 issue.
I have had many issues with non ngk/denso plugs causing noise in the crank/cam circuits, resulting in stalls, missing, and no starts. I would get the Bosch plugs out and ngk/denso in to eliminate those as an issue.
The burning oil is 99% caused by coked oil control rings, usually takes a screw driver and a little tap tap to get then out of groove. The other thing that can happen due to vcm is that all the ring gaps line up and pass oil.
Ok in other words the smoke and the misfire could be 2 different issues?
 

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I believe so, never have seen light oil burning cause miss, until the plug is fouled. I seen cars that you can't see behind due to oil burning not missing.
 

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Check EGR passages in the intake manifold. They get carbon clogged after many miles, choke the EGR system, and cause random misfire codes. Clean them out at least every 100k miles.
 

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Discussion Starter · #19 ·
I believe so, never have seen light oil burning cause miss, until the plug is fouled. I seen cars that you can't see behind due to oil burning not missing.
mmhm but that's weird since I switched around the plugs and coils and Check Engine was always on cylinder 1,2,3.
HERE are the pictures of the "new" plugs with less than 100 miles on them

137024
Spark plug Auto part Screw Automotive engine part Automotive ignition part
 

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Discussion Starter · #20 ·
Check EGR passages in the intake manifold. They get carbon clogged after many miles, choke the EGR system, and cause random misfire codes. Clean them out at least every 100k miles.
They are clean i cleaned them while i did the valve adjustement
 
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