Modify O2 sensors

[ZugyNA]

http://www.lubedev.com/smartgas/ultra5.htm


Cover Oxygen Sensors with Aluminum Foil: Wrap your oxygen sensors in the exhaust pipe with 7 to 10 layers of shiny foil.

Advantage: The car computer system depends on the oxygen sensors to adjust the air-fuel mixture being fed to the engine. The cooler the exhaust gases, more fuel gets sent to the engine. The hotter the exhaust gases and the oxygen sensor, less fuel will be sent to the engine.

Directions: To seal maximum warmth inside the area near the sensor, insulation in the form of Reynolds Aluminum Foil is employed to insulate the oxygen sensor. Wrap five inches in front and five inches after the sensor to keep it warmer. We double a one-foot section of foil and wrap that around the pipe and around the sensor itself. Do not remove the sensor. Then we repeat the process several more times. Finally we use .030" copper or aluminum wire to wind around the aluminum foil to keep it from blowing away and be sealed against water. The wire comes from any welding supply. The goal is to fool the car's narrow band sensor and computer into sensing too rich a mixture so it adjusts to a slightly leaner mixture and possibly a slight advance in timing. The end result is smoother engine operation and better MPG. This trick is especially important in severe winter climates. My catalytic converter went bad after 147,000 miles. A large piece inside was blocking the exhaust flow and cost me a drop of 12 MPG. I replaced both oxygen sensors and the catcon and wrapped the sensors with aluminum foil so my MPG came back. Do not wrap with ordinary gray duct tape as it will burn off. Have your mechanic CHECK that catcon on your car. Do not take it for granted because all the good changes you make for mileage could be negated by such things as a bad catcon or bad plug wires or bad oxygen sensors some such hidden defect.

I'm pretty sure that adding resistance to the O2 output makes the mix richer. I have an EFIE the V6...helps some.