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Wow you just made my day

Here I've been worrying about stupid idle stop for months haha and my chosen EXL won't even have it
Best to get your 6-speed Pilot this year. I suspect next year all trims on the Pilot move to the 9-speed just like the Ridgeline did this year. Will join the Passport that is all 9-speed and Ody with it's all 10-speed.
 

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So back to this VCM issue. My '19 touring has had an odd vibration, starts hi-30s thru the 70s. Odd, huh. Alignments, balances, specialists (all on my $$)..not a problem with the align or tires or rims or balances...performance specialist & I both agree, seems like more than 1 issue. But it still has the odd vibration. (And has also pulled to the right since new)

Feels kinda forward-backwards vs side to side in the steering wheel. Can feel it in the car, as it got worse, can really feel it in the passenger front seat (kind of fast light)..... Dealer, oh we don't feel it, over & over. Tech rode w/me one day, he asked me to get on it, so I did - his eyes opened big, wow, driveshaft or tranny?? Then they put their stock rims on, omg weirder - extremely fast in the steering wheel & hoppy in whole car. blah blah blah pulling to right 'normal', blah blah blah... told them I'm looking for another dealer, and will be sending all my bills to corporate explaining how worthless they were to me, they got all ooooo are we helping you more now? Nope.

I went to a different dealer, who has lots of customers liking the jsportusa lifts dealers are putting on, thinks nothing of people putting their own rims/tires on..... They showed me this video - and it looks exactly like the odd vibration feels, and look at the speed range the possible vibration occurs!!!!

Put S-VCM on it - changed the 30s-70s odd vibration!!! But there is still the odd fine/quick one that seems to get worse w/acceleration..... Sadly the covid-19 has slowed down access to the new dealer/shop, so have to wait awhile to go further with them.

 

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Note on the video above. 4 cylinder mode is no longer used after 2015. Current system now is only 3 or 6 cylinder mode.
 

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I'm curious if anyone following this thread has a 9spd & did the S-VCM, your observations??

Seems to me the shift points are at higher rpms. But since we're socially-isolating now to flatten the curve & protect each other, I'm not doing as much driving to really check it out.
 

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Note on the video above. 4 cylinder mode is no longer used after 2015. Current system now is only 3 or 6 cylinder mode.
Didn’t realize Honda went back to 6-3 cylinder VCM. My guess is they were getting a lot of cylinder 3 failures with 4 cylinder mode VCM. Do you know if Honda changed the piston ring design to mitigate the oil fouling problems on deactivated cylinders? Here is an excellent video on a cylinder 3 misfire caused by oil fouling on a gen 2 Pilot.
 

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@Silverwolfe Your vibration problem sounds like a bad active motor mount. My 2005 Odyssey with VCM had similar vibration issues caused by a failed rear motor mount.
Higher shift points make sense if the PCM detects the engine isn’t warmed up. S-VCM works by modifying the ECT1 temperature parameter to disable the PCM from activating VCM. If S-VCM is malfunctioning it may be causing higher shift points. But if that’s the case you should eventually get a CEL. Probably worth contacting S-VCM tech support.
 

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@Silverwolfe Your vibration problem sounds like a bad active motor mount. My 2005 Odyssey with VCM had similar vibration issues caused by a failed rear motor mount.
Higher shift points make sense if the PCM detects the engine isn’t warmed up. S-VCM works by modifying the ECT1 temperature parameter to disable the PCM from activating VCM. If S-VCM is malfunctioning it may be causing higher shift points. But if that’s the case you should eventually get a CEL. Probably worth contacting S-VCM tech support.
I suspected if the S-VCM changed the vibration, it might indicate a problem w/a motor mount.

I wondered if the different shifting points was just from being in 6 cyl mode. Seems like instead of usually shifting at 1500-2000rpms, it might shift more now at 2-2500 rpms. It doesn't feel or act badly. But you think that might be a failure of the vcm?

I'll go for a country road drive today to verify, then write to the maker. I've already corresponded with him about putting it in. (did it originally when the motor was too warm, created all kinds of chaos! had a shop redo it when 'overnight cold', no codes or lights at all.)

I hadn't played w/S-mode yet (sport on the 9spd tranny) to see if it shifted at different points. .

Thanks for the suggestions.
Terry
 

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Assuming you are referring to upshift shift points during acceleration, VCM is disabled under acceleration so it’s always in 6 cylinder mode where you suspect the shift points are changing. A quick test would be to disable S-VCM by removing the fuse in the S-VCM power wire. If the shift points return to normal, then S-VCM is causing the extended shift point behavior. If you have a scan tool, monitor ECT1 temperature. The S-VCM website says they target 167F as the setpoint for the reported coolant temp to disable VCM. Without S-VCM, the reported coolant temp should be about 190F which is the actual coolant temperature set by the engine‘s thermostat.
 
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