Hi everyone, sorry for being so late in getting back.
We finished the install today and fired the system up.
I plugged in my scanning tool and monitored some points with the vehicle idling, everything seemed well. I noticed the typical (especially for diesels) gobs of black smoke coming out the tail pipe for a bit. This is due to the HHO cleaning out the internal surfaces of the motor.. kinda like when you quit smoking and get sick for a few days as your body detoxifies. Same thing here, all the old carbon deposits were being cleaned out, this cleared up after a bit and the engine began to run smoother.
I am having a bit of an issue with the controller. Perhaps you all could lend me a technical hand here in determining the next step.
Ok so here is the deal. I use a controller (Rheastat) to modify the signal return on either the map sensor or maf sensor of a vehicle. I have experience with Over the Road Diesels.. but this is the first "little diesel" and I have never worked on a VW before. Traditionally on a standard vehicle tying into the map/maf sensor will allow me to lean the fuel flow back enough that the motor will about 3/4 of the way "around the clock". I really don't like using maf because it is always touchy.. but some cars (fords mainly) do not use map sensors for any type of fuel control.
So.. what I did was tie into the MAF sensor of this bug. The reading varies from .8 at an idle to 5~ volts under full throttle or load. When I adjust the controller even a fraction of a hair it jumps the voltage to around 2 volts and the vehicles safety kicks in (I see a bypass lever behind the oil fill cap go down and the motor goes into a "safety" mode. When the knob is turned back to the appropriate condition I see the lever disengage and the vehicle begins to run as normal again. Basically.... I have no control over diesel flow with this sensor. I am uploading a video of this right now (but its progressing slowly) to show you all what happened. It shows the data on my scan tool appearing live (though I do not know how clear it will be when everything uploads, we will see).
If anyone has any suggestions on how I can lean back the amount of fuel going into this motor.. I am listening.
For now, what I am doing is running the vehicle with no electronic controller hooked up, but still has the Hydrogen going into the motor. I am seeing a very very noticeable increase in torque/hp. The motor is running smoother.
I am taking a trip from Missouri to Houston on Monday, and will log fuel MPG during this trip to see how it was affected. I believe that with the extra power, I will be able to see an increase in mpg because I do not have to press the pedal as far down to maintain the same speeds. Basically, doing the same amount of work (speed) with less effort (fuel).
But again, this remains to be seen. I will post the numbers when I get them. If anyone can help me identify a way to reduce the fuel flow however.. I know for a fact I can up the MPGs. Anyways, that is where we are at for now, any questions or comments or suggestions please post them up. We learn by doing and this is a (fun) learning experience.
PS: Here is a pic of the final install, I had to remove the motor cover in order to fit everything, I just stuck it on the shelf in the shop. The Video from my data scanner is still uploading to photobucket it is 40% done. When it is finished I will post it.