4 3 Chevy Tbi Sensor Wiring Diagram

Testing the oxygen sensor commonly referred to as o2 sensors on your 4 3l 5 0l or 5 7l gm vehicle is not that hard to do. Typically technical support is limited to the customer with only a harness purchase due to the complexity of variables we have no control over. Basic connections are standard but it is easy to customize one for your needs.

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4 3 chevy tbi sensor wiring diagram. 1923 chevrolet car wiring 1923 chevrolet general wiring 1923 chevrolet superior model 1923 chevrolet wiring 1925 chevrolet superior model series k 1927 chevrolet capitol and national 1927 chevrolet capitol and national models 1928 chevrolet general wiring 1928 chevrolet wiring 1928 chevrolet. Since oxygen sensors are not cheap and sometimes the pcm powertrain control module fuel injection computer accuses them of being bad when they aren t testing them is a good idea and this article will help you. This is a basic tbi harness for all engines using ecm 1227747 and 1228746 type ecm many others can be used. Once you have each wire identified and layed out then you can set it up on the engine and start tailoring it to fit your engine.

Page 1 of 2. 1993 pcm connector pin out chart gm 4 3l 5 0l 5 7l. Lay the harness out on your work bench and have each sensor plugged into the harness then trace each wire back to the ecm connector you will be able to separate a lot of uneeded wires consult wiring diagrams. Ect sensor connects directly to ecm with two wire connector gm p n 12146312 or 29036979 delphi ts10075 used widely in gm vehicles sensor is a non linear thermistor which varies resistance with temperature.

The ecm sends a precise 5v reference to the thermistor and uses the return voltage to establish temperature by. Chevrolet vehicles diagrams schematics and service manuals download for free. Red connector pin out chart.