[Gray_Beard]

I have been using the VCM Tuner II since January and have no complaints whatsoever with it's performance. But, I have been wanting at certain times (long road trips) when I'd like to have it deactivated and back to normal VCM ability for higher gas mileage. Running the included ground wire to ground will negate it's operation. So I decided to have a switch on the dash where I could turn the ground on or off. In a separate post (Firewall Access) I asked if anyone knew of an easy way to breech the firewall and Dude CS posted the instructions to the lighted running boards. I planned on going that route when I noticed an even easier way. Upon removing the kick plate the hood release cable gave the perfect route for the 18 gauge ground wire. Whats good about this is it keeps the wire out of the weather and makes for a clean and neat installation. I used insulated spade lugs plus a mount for the module so all could be easily removed before taking the vehicle in for service at the dealership so the need arise.

 

[JRJ]

Looks great- nice work. Is there a way to tell if it's on or off?

 

[Gray_Beard]

Looks great- nice work. Is there a way to tell if it's on or off?

Switch button out = VCM on
Switch button in = VCM off

 

[lmracefan]

If i could ask, What is this VCM you are talking about?

 

[carpayments4life]

VCM = variable cylinder management, is a Honda feature.
When the radiator fluid reaches a certain temperature, the Honda's ECU will deactivate 2 cylinders, turning the v6 engine into a 4 cylinder, for improved mpg.
When this happens I can feel a mild clunk and installing the VCMii Muzzler will cause the improved mpg to go away and allow the engine to use all 6 cylinders all of the time.
The VCMii Muzzler needs to be installed on a cold engine, but can be turned on/off by connecting its green wire to ground, via a on/off switch, in the OP's example.
Honda's VCM system works great, on the Interstate, but offers too many clunks when driving in the city, for me.
$120 VCM Tuner vcm ii muzzler for 3.5L Honda older than 2007

 

[lmracefan]

VCM = variable cylinder management, is a Honda feature.
When the radiator fluid reaches a certain temperature, the Honda's ECU will deactivate 2 cylinders, turning the v6 engine into a 4 cylinder, for improved mpg.
When this happens I can feel a mild clunk and installing the VCMii Muzzler will cause the improved mpg to go away and allow the engine to use all 6 cylinders all of the time.
The VCMii Muzzler needs to be installed on a cold engine, but can be turned on/off by connecting its green wire to ground, via a on/off switch, in the OP's example.
Honda's VCM system works great, on the Interstate, but offers too many clunks when driving in the city, for me.
$120 VCM Tuner vcm ii muzzler for 3.5L Honda older than 2007

Thank you

 

[Strfl26]

Hi Carpayments4life,
I’m planning on doing a similar VCM Tuner II install and I’m wondering once you have the VCM Tuner and an in cabin switch installed, are you also only supposed to activate the switch (turning VCM on or off) while the engine is off and cold? Or are you able to use the switch while driving?

I understand it needs to be installed on a cold engine but I’m not seeing it clearly stated that you can or can’t toggle the switch on a running vehicle.

VCM = variable cylinder management, is a Honda feature.
When the radiator fluid reaches a certain temperature, the Honda's ECU will deactivate 2 cylinders, turning the v6 engine into a 4 cylinder, for improved mpg.
When this happens I can feel a mild clunk and installing the VCMii Muzzler will cause the improved mpg to go away and allow the engine to use all 6 cylinders all of the time.
The VCMii Muzzler needs to be installed on a cold engine, but can be turned on/off by connecting its green wire to ground, via a on/off switch, in the OP's example.
Honda's VCM system works great, on the Interstate, but offers too many clunks when driving in the city, for me.
$120 VCM Tuner vcm ii muzzler for 3.5L Honda older than 2007

 

[carpayments4life]

Install it on a cool/cold engine.
After that it doesn't matter if the engine is hot or cold.

Don't burn your hands, by physically removing the VCMii (in the dealer's parking lot), when the engine is hot. Remove it, before you take the Passport in for a dealer service, at home when the engine is cold.

I only connect my VCMii's ground wire to chassis ground, before I travel long distances on the Interstate. By connecting this ground wire to ground, I am allowing Honda's gasoline management system to operate.

 

[Strfl26]

Sounds good. That was my plan to only re engage the VCM (via switched ground cable) on long trips, and completely remove the device on a cold engine before taking it in to Honda.

Thank you!

Install it on a cool/cold engine.
After that it doesn't matter if the engine is hot or cold.

Don't burn your hands, by physically removing the VCMii (in the dealer's parking lot), when the engine is hot. Remove it, before you take the Passport in for a dealer service, at home when the engine is cold.

I only connect my VCMii's ground wire to chassis ground, before I travel long distances on the Interstate. By connecting this ground wire to ground, I am allowing Honda's gasoline management system to operate.

 

[P-A-N-D-A]

GM is now deleting VCM in some of their trucks . . .

 

[Tamak44]

GM is now deleting VCM in some of their trucks . . .

with a $50 dollar discount!!! but saving new owners hundreds in engine work down the line haha.

 

[JHvol]

I just installed the VCM Tuner II on my 2016 Odyssey and would like to set it up for in cabin on/off for longer trips. I have not found any how to guides and I am a complete novice…

Do you have any tips? Do I run a ground wire from the switch and plug that into the tuner green wire? Lol.