AFR on Tacoma's and Tundra's

[jaxbrian]

What is the best way to reset the ECU? Disconnect the battery terminals? Or is a scanner required?

[John Sargent]

Disconnect your battery cables, next...locate the fuse for your ECM and pull it. Leave it off for about an hour, then put fuse back in before connecting battery. This will clear the memory now to accept the HHO into the system. This should last for about (3) months before making the same adjustments. After about (3-4) times, the adaptive memory will now recognize the HHO as part of the mixture. Process may take up to a year, but you don't mess with the electronics; it is slower but safer; and definitely cheaper than buying electronic parts that may or may not work (and they don't with AFR sensors).

[Keith's Garage]

First, the best way to reset the computer is with a scan tool.

John, I am interested in this theory of resetting the ECU to have it adapt to HHO. Is this something that you have personally gotten to work or is this just a theory. I personally do not feel this will work. Computers will learn, that is true, but they were not programmed to learn the properties of HHO. Please let me know what evidence there is that this will work. I am very curious.

[coffeeachiever]

If it could just be that simple. Please, please, please post whatever results you get. I am waiting with baited breath.

[John Sargent]

First, the best way to reset the computer is with a scan tool.

John, I am interested in this theory of resetting the ECU to have it adapt to HHO. Is this something that you have personally gotten to work or is this just a theory. I personally do not feel this will work. Computers will learn, that is true, but they were not programmed to learn the properties of HHO. Please let me know what evidence there is that this will work. I am very curious.

Hi Keith,
Thanks for the info on resetting with the scanner. Here is some info from Bart Rosario, who attended the recent HHO expo in Florida. This is where I got the idea for trying the reset of the ECU.

"It was at the Water4Games Games (check out the website; Water4Gas.com), that I met well known, Jerry Watkins. This man has been building/installing vehicles throughout the USA.

I shared with him the issues I had with my Toyota truck and the AFR sensor. It was then, that he began to explain why tampering with the electronics can really cause problems later. He suggested flashing the ECM several times, each time lasting about 3 months or until the results wore off, then flash again. Eventually the ECM adapts. It's like trying to remember something....you read it or repeat it several times until it's engrained. Neurons at work. It appears these ECU's have the capacity to retain info even after flashings."

I began wondering how the ECU could retain the initial info with HHO being added after it had been reset, and found this:

The reason the HHO adjustments are not lost is because the ECU has "keep alive memory", which is not lost when power is. Same principle as a ROM chip, hard drive, etc. So, it is possible to, over several months, to re-program your ECU to accept and run with HHO.

Here is the info on "keep alive memory" and the link:
http://everything2.com/e2node/ECU

"The computer's decide stage takes the data from these sensors (more on them later) and makes decisions about what to do based on the input. While a computer cannot make two different decisions based on the same information, the computer itself has state based on the keep alive memory (KAM). The computer is programmed to make decisions over time about the optimal way to operate the engine, and it stores the results of these decisions in the KAM so that over time it can adapt to changes in the motor due to wear of the engine and associated components. Program code is loaded from the ROM and
executed by the CPU to process the sensor data and control the actuators in the act stage. Especially since the introduction of OBD-II, OEMs are using EEPROM and Flash RAM to store the "ROM" code so that it can be updated at a later time without replacing any physical hardware."

Keith, I realize that I may be totally off-base on this, but it seems to me that it is better to try resetting the ECU periodically and not trying to mess with the wideband AFR sensors, which I have in my 2 Hondas. I too am hoping that you and the guys at Split Second can come up with an electronic mod for the AFR sensors, but hasn't happened yet, has it?

Is it correct that, as of now, there is no real way to adjust the AFR in wideband AFR sensor equipped cars?

I respect your opinion and input, and am definitely interested in your take on all of this. Thanks much for taking the time to reply, in advance!

John

[wsv3424]

john, any promising news on the toy afr's systems re-learning?

[John Sargent]

AFR nightmares are over, as the resetting didn't work. Tried several times. In December, the first real, working efie for wideband efie for afrs came out, I bought two, put them each on our Accord and Civic, and they have been working great. Here is where I got them (their support is great also, and they will send you a wiring diagram of which wire is the one to use):

http://www.fuelsaver-mpg.com/store/i...roducts_id=189

Hope this helps,
John