[HRL383]

Dealerships.🤦‍♂️

 

[Exkal1bur3]

Dealerships.🤦‍♂️

Of course he ended the conversation with “ let us know what you think if you can still feel it”.

 

[wjfyfe]

Just a couple of tid-bits of prolly useless information where the VCM seldom comes on when coasting, (like downhill, where I thought it would come on), but add just a soft touch on the accelerator will then kick it on. Also the VCM kicks off when the transmission is providing braking. So apparently the VCM wants the vehicle to be under at least minimum power?

However, just a bit more on the accelerator and the VCM pops off, so it is some-what touchy and operating only in a very narrow band-width.

I have now noticed the VCM coming on into the lower 20's cruising about town.

Again, this is just watching the ScanGauge, there still is no physical sensation of it's operating.

Bill

 

[Exkal1bur3]

The “loop” closes way below 165* ECT.

Do you know what temp it closes? I noticed VCM gals reads the PCM at 165 and with VCM back on the vehicle maintains 189-190 steadily.

 

[Exkal1bur3]

Truck is back from the dealership with no issues with VCM or motor mounts. They also performed the transmission software update. I can still feel VCM every time it’s enabled. Feels almost like driving over a rough paved road in the steering wheel, i can also hear the tone in the truck change a little. The biggest issue for me is how it changes the downshifting of the transmission so poorly.

Needless to say, I tried to get it repaired, tried to just deal with it, but I will be reinstalling S-VCM for the smooth operation and downshifting. I’ll update In the future if I experience any issues with it. I honestly don’t see a change in MPG on or off maybe 1mpg but it’s hard to tell if the drives are different or the way I’m driving.

 

[zroger73]

There's obviously some variance that makes your Ridgeline different from others because what your describing simply isn't normal.

 

[HRL383]

Do you know what temp it closes? I noticed VCM gals reads the PCM at 165 and with VCM back on the vehicle maintains 189-190 steadily.

The "loop" closes when the heated O2 exhaust sensors become hot enough to send their signal/info to the ECM. Most modern vehicles have electrically heated O2 sensors in order to "close the loop" quickly. I observe "closed loop" within seconds of cold engine start-up. There's no reason for the A/F ratio to be rich/lean just because engine coolant is not at X temp.

 

[stevem5215]

My VCM was noticeable too Roger. With it disabled it's noticeably not there. It's the buzzing that i noticed.

 

[wjfyfe]

Just another mostly useless tidbit where the VCM and cruise control appear to be real buddies where the VCM seems to activate more when the CC is engaged?

Bill

 

[HRL383]

The few times I used CC (hiway speeds and prior to disabling VCM), I had never observed VCM “ON”. I did notice at low speeds (>30 mph) the slightest push of the accelerator/throttle would disengage VCM (switch from 3 cyl to 6 cyl mode). Since CC is constantly changing throttle position, that may be why I never noticed VCM “ON” the few times I used CC.🤷‍♂️

 

[millerbl0]

There's no reason for the A/F ratio to be rich/lean just because engine coolant is not at X temp.

I wouldn't be sure of that. Its a complex system

 

[181804]

I wouldn't be sure of that. Its a complex system

I thought you were sure of it. You were saying earlier that the system will run rich if you use sVCM. You are the only one stating this and it contradicts all others' experience:

And the fuel trims run rich.

MPG dropped greatly with disabled. I believe because of fuel trim

lost at least 4 mpg

The ECU thinks the engine is never warmed up keeping a richer mixture.

I show richer fuel trims in my scangauge

Disabling VCM does make the engine run richer.

 

[millerbl0]

I am saying you cant be sure that its NOT running rich.

It IS running rich.

 

[181804]

I am saying you cant be sure that its NOT running rich. It IS running rich.

Yep, we've heard you. You are sure it's running rich.

The thing is, you're the only one reporting this and the only one stating your mpg has dropped by "at least 4 mpg" using sVCM. No-one else that uses sVCM (on Ridgeline or other forums) seems to be seeing the same thing you are.

So, I'd conclude there is something wrong with your particular vehicle, not sVCM.

 

[millerbl0]

No codes, No vibration. Great MPG. No problems.

 

[wjfyfe]

Is the VCM the only system affected with the tricking of the engine not reaching operating temperature? The common sense within me is doubtful.
Bill

 

[181804]

No codes, No vibration. Great MPG. No problems.

Yep, for all those have installed sVCM (other than you) that's what you get. Just a smooth-running (actual) V6. All the time

 

[millerbl0]

VCM is NOT the only system affected with tricking of the engine not reaching operating temperature.
I have smooth-running all the time too.

 

[HRL383]

I am saying you cant be sure that its NOT running rich.

It IS running rich.

…..and here I thought the heated O2 sensors “closed” the loop once heated, allowing the motor to run clean/lean. How silly of me.🤦‍♂️🤦‍♂️🤦‍♂️🤦‍♂️ I’ll have to pay closer attention to the ScanGauge as to how many seconds it takes for “the loop” to switch from “open” to “closed”. A number of variables allow the system to switch back and forth, closed to open/open to closed while driving.

Back to disabling VCM.

 

[Apb486]

I think the SVCM affects the temp gauge too, mine is at least 1/32" lower than it used to be.