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O2 Sensor EFIE Project Page 1

This Website is Created and Maintained by chris--at--OUPower--dot--com (Fix the address for it to work!)
This Project was last updated on: July 17, 2008 07:17am v7.01

WARNING! Many, if not all of the projects described within these pages, contain dangerous and potentially fatal consequences if you do not exercise proper precautions and follow standard safety procedures. The owner of this site takes no responsibility for injury sustained by anyone attempting to duplicate or utilize any of the information on this site. The information here is strictly for Educational Purposes! -USE AT YOUR OWN RISK!

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To install, simply cut the wire coming out of your oxygen sensor and tie it to the input of the device.  Next tie the other side of the wire you just cut to the output of the device.  Next add power from a source in your vehicles electrics that is only on when the car is running, key turned to "on."  Such a place is a MAF sensors power or a MAP sensors power.  Run a wire from the "-" terminal or "ground" terminal to a spot on your vehicles engine block or a grounding node on the chassis of your vehicle.  Once this is complete your circuit should work as intended.

This is the schematic for a single unit, for a double unit just build the amplifier section twice.  Pot 1 is your rich/lean pot.  The pot right before the ECU is a voltage limiter,  this should be tuned be supplying a 1v input signal and adjust that pot until there is < or = to 1 volt at the output.  This is to restrict any voltages over 1 volt from ever reaching your vehicles computer, if a signal greater than 1 volt gets to the computer it will trigger your check engine light and will become a hassle.  
Parts List
3x 100 ohm resistors
2x 1meg ohm resistors
1x 330 ohm resistor
1x 1k ohm variable resistor
1x 10k ohm trim variable resistor
1x 4.7k ohm resistor
1x 1k ohm resistor
1x 100uf capacitor
1x 7812 voltage regulator
1x lm324 quad operational amplifier
1x LED

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Click Here to Re-Display the Main Project Page

This Website is Created and Maintained by chris--at--OUPower--dot--com (Fix the address for it to work!)
This Project was last updated on: July 17, 2008 07:17am v7.01

WARNING! Many, if not all of the projects described within these pages, contain dangerous and potentially fatal consequences if you do not exercise proper precautions and follow standard safety procedures. The owner of this site takes no responsibility for injury sustained by anyone attempting to duplicate or utilize any of the information on this site. The information here is strictly for Educational Purposes! -USE AT YOUR OWN RISK!

Click Here to go to my YouTube Channel!!

Click Here to go to our NEW Facebook Discussion Group! This is replacing the old Discussion Board!

Click Here to go to our ARCHIVED Discussion Boards.

Please consider donating to help support this website!