FUEL VAPORIZATION, DOUBLES MILEAGE

[z.monkey]

Howdy Sprocket,

The EEPROM that you are talking about contains the variables for the system and not the executable code for the operating system.  Unless you are an assembly language programmer with intimate knowledge of engine management controllers there is not a lot that you can do...

Blessed Be Brothers...

[Zolar1]

Ok, I am Sooooooooo screwed!

So, my best bet would be to keep trying to fool what I already have....

I wonder if someone makes a reverse performance chip??

[z.monkey]

Howdy Zolar1,

Performance chips usually use more gasoline to make more power.  Cheating the sensors is feasible.  If you make a circuit to change the voltage coming back from the exhaust oxygen sensor you can fool the system into leaning out the mixture, or visa versa...

Blessed Be Brothers...

[Sprocket]

Ok, I am Sooooooooo screwed!

So, my best bet would be to keep trying to fool what I already have....

I wonder if someone makes a reverse performance chip??

If you are really keen, alternatives exist!

http://www.diyautotune.com/

[allcanadian]

@zolar1

I am wondering though...
Let's assume you had a 200MPG carb and tried to put it on a brand new car.
Since the computer's fuel mapping prevents getting more MPG (unmodified controls), how would you remap the computer to accept the leaner conditions?
And what kind of emissions would the vehicle have if using such a carburetor?

I would agree with z.monkey, you have zero percent chance of hacking the cars computer. If I had a 200mpg carb I would split the intake air flow into two sections 1)stock system for idling and 2) 200 mpg carb for running higher speeds.
Consider the control loops present in a modern vehicle, timing is a function of RPM measured at the crank as is the fuel injection but fuel is also tied in to the map sensor----no increasing air flow through map sensor on stock system means no extra fuel added but ignition timing may still follow the crank pickup signals. In this case maybe we could fool the engine into thinking it was always idling as far as the fuel system was concerned but other variable like timing would remain unchanged. Another option is to Hack the O2 sensor to run lean then use a thermocouple at the engine exhaust to vary a water injection system to keep the exhaust gas temperature constant so you don't smoke your valves and pistons.