For 2 1/2 years I've just hated the way my RDX drives. The only thing that kind of describes it is it felt like the engine was sort of not firing on all cylinders when I'd drive it. Stumbling on acceleration etc...

Over on the Honda Odyssey forum, the Odyssey uses the same 3.5 motor, a guy came up with a simple hack that TOTALLY solves ALL of it.

I can't tell you how much difference this makes, at least on my car. Finally I have a car that simply runs on all 6 cylinders, all the time. Shifting is smoother, acceleration is good and also very smooth, NO vibration except typical A/C...

It's all related to the idiotic VCM system. (the one that has the engine run on 3 cylinders but ups it to 6 when needed.) This simple hack disables the VCM system, at least for 95% of the time.

It works by spoofing the computer with a simple resistor so that the computer never sees the temperature rise to normal operating temperature which is 167 degrees. It keeps it around 162 to 165. If I sit in traffic, sometimes it'll creep up to 167 - 169 and the vibration will start. Once I get going again it goes back down and VCM shuts off.

I've had it for a little bit now and it works perfect. No check engine light, gas mileage is unchanged and no VCM b.s.

Here is the thread on the other forum to anyone interested in this.

VCM - A better way to disable.

 

Would be nice to have pics, and know where to connect that resistor and what resistor to use.