The continental flex fuel sensor measures the ethanol gasoline ratio of the fuel being used in a flexible fuel vehicle.
Continental flex fuel sensor wiring diagram.
In checking my wiring work with a multimeter before actually plugging the molex to the flex fuel sensor with the ignition key on but without the engine started and running i confirmed 12 and ground but was surprised to see 12 also coming out of the wire connected to deutsch pin 9 digital in 3 flex fuel sensor hz.
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In order to adjust the ignition.
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Continental flex fuel sensor instructions 1.
The flex fuel sensor has a three wire electrical harness connector.
The signal circuit carries the ethanol percentage via a frequency signal.
I have used 26g tefzel for them on the bench without issues as well.
I have run the continental flex sensors using 22g tefzel in a vehicle with the cable run to the sensor from the ecu around 4m.
The power source is battery positive voltage and the ground circuit connects to an engine ground.
Modifying the fuel system on your car can be extremely dangerous.
Most temp and pressure sensors have very low current draws otherwise they would overload the 5v rails on ecu s so can be used with quite small wire.
Mistakes can cause fuel leaks or other issues which can lead to serious injury or death.