Join Date: Jun 2014
Location: Edmonton, Canada
Feedback Score: 1 reviews
Okay folks, my apologies for the delay, a bit busy lately and took some time off to fly to L.A., watch an awesome King's Hawks game. I've turned by thoughts back to this problem and done some more testing and I have the solution to your problems.
After spending a lot of time thinking about how I was going to do everything I posted in the OP above, I realized that it would be too complicated for most to implement and too hard to strip out when required, so I concentrated on simplifying and came up with a brilliant, but ridiculously obvious and simpler idea.
Rather than create a separate circuit that I would switch to when the engine is close to operating temperature, I spent some time using my OBD tool, determining the extra resistance needed in the ECT circuit to drop the temperature at the high end from 172-175 degrees F down to 162-165. The beauty of this new method is the following:
1. Pure plug and play solution, no switches necessary.
2. Temp gauge still works and shows engine temperature, the only difference is that it reads about half a mark less at operating temperature.
3. Warnings will still occur if the engine overheats.
4. The ECT sensor works on a logarithmic scale, which means that at colder engine temperatures, the temperature shift becomes virtually nothing as far as the PCM is concerned, so cold engine operation is unchanged.
5. Easy disconnect to revert back to OEM configuration if desired for EPA inspection, work at the dealership, or long trips in nice weather when VCM would be beneficial at high speeds and summer temps.
6. No CEL warnings that masks other warnings that come along.
7. No other systems disabled, like VTM when you pull the pressure sensor
I've been testing this new solution for a few days now and I can tell you with complete honesty that this is the ****! No warning lights, no disabling of VTM or other desirable functions. The vehicle thinks it hasn't quite reached operating temperature, so VCM never kicks in. It drives like it should, no vibration, no hesitations during VCM transitions, it's beautiful. The only thing that happens is that when you plug in or unplug the add-in harness, the PCM reads a shift in the ECT sensor reading and throws a code saying that ECT 1 appears faulty. After about three drives, the PCM is fooled into thinking that the new condition is the norm and the fault clears itself and no more errors.
I have not cut any wiring, I found the OEM female connector and created a harness. The male connector is much harder to get and although I've finally found it, it's going to require me to buy a large quantity of them from overseas. The harness I'm going to create is going to consist of the male and female connector, and the added resistance in between. Harness will consist of OEM male and female Connectors, properly sealed etc along with the resistance, also properly sealed with shrink tubing. The harness will appear OEM.
Because I have to buy large quantities of the male connector, I plan on making and selling the entire harness to everyone that wants one. I'll be setting myself up on ebay with my paypal account to make it easy for everyone to order one. The price will be about $30-35 Canadian (USD 24-28) plus shipping. I'm not sure how long it will take for the connectors to come once I order them, but it shouldn't be more than a month or so from overseas.
I am certain that this isn't having a detrimental effect on the engine or A/F ratios or anything of the sort. The difference is so small that the PCM doesn't even read it as an error once it recognizes the new range on the sensor. It drives like a dream, with no error codes and even though the one connector right now is just wrapped with tape with the wires poking into the female connector, I don't plan on undoing it while I wait for the male connectors to arrive.
For all of you that hate the VCM vibration issues, or just hate the fact that VCM is destroying your engine by fouling plugs, causing vibration, excessive oil consumption and the like, this is definitely for you. I've tried to keep the price reasonable considering the time and effort this is going to take on my part to get the parts, put them together and take orders, ship out etc. I hate the whole concept of VCM as stated in my OP and I'm so excited by these results. Even if a few of you would like to try it once it's available and report back to the others, that would be great. I'm not doing this to make tons of money, I just want to help everyone here.
I'm back to loving my Pilot again and I'm so happy to be VCM free, I hate that ****.
Let me know your feedback and interest in having one made.