OK to modify oxygen sensor?

i would say don't tamper with your car if its running fine now. to get a 5%-7% gain (which you may not get) in fuel economy is not worth it. just make sure your tires are properly inflated, go easy on the gas and don't drive much and you can save that way instead.

Why does decreasing the exposure to exhaust make the sensor think the mixture is leaner? And if the sensor indicates a leaner mixture, shouldn't that make the computer think the mixture needs more fuel rather than less?

Why does this threaded adapter have a tapered seat when the exhaust manifold require a flat seat with sealing washer?

Why do so many of the feedback comments seem like spam? Example:

"SAVE GAS MPG HHO o2 oxygen sensor extender EFIE Hydroxy"

I bought enough mileage gadgets on Ebay to increase my mileage by

looks like a spark plug non-fouler to me.

Considering that it is also a federal law violation for tampering with the sensor.

hubcit wrote: ... go easy on the gas

Going easier on brakes may pay off more if it is stick shift. Don't go too easy on throttle- that can be self defeating.

Even with automatic, too little throttle opening can spoil efficiency.

If you run your engine leaner, you might use less gas. The other consequences are not good ones. On some engines they are pretty awful.

If the manufacturer wanted the engine to run leaner, they would have set the ECU to run it leaner.

--scott

IMO, moving the O2 out of the exhaust stream would make it run cooler thereby increasing the amount of gas being used and potentially destroying the Cat. I agree with m6onz5a, the device is a spark plug anti-foul for oil burning engines.

These HHO people are scam from the outset. Absolute BS on the HHO technology.

And, as previously mentioned, would likely be a violation of FEDERAL law...

____________________ And it's your's for the unbelievable price of . . .

$19.95!!!!!!!

LOL

That was very true with carburetors, opening the throttle to the point just before the power valve engaged made for better fuel artomization. Does anyone have direct personal experience with the gas-and-coast method and its effect on a modern car? Thanks, Ben

The way I learned it is that the Air/Fuel ratio is biased to give better fuel economy at part throttle and better power as the operator approaced wide open throttle.

Assume that the system can be designed to provide any amount of fuel, but the air is limited by several things, notably the displacement of the engine.

At part throttle, the engine calibration is set to provide a small amount of fuel. The goal is to consume all the (small) fuel charge. Excess oxygem in the exhaust is desired.

At WOT, the calibration is set to provide a larger portion of fuel in the attemtp to consume all the oxygen. Excess oxygen in the exhaust indicates unmet performance.

Val