Bear Posted October 14, 2003 Report Share Posted October 14, 2003 How many and where are the HO2S on a 94 3100? Quote Link to comment Share on other sites More sharing options...
MaroonRegal Posted October 14, 2003 Report Share Posted October 14, 2003 the whattahuhs? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted October 14, 2003 Report Share Posted October 14, 2003 I think you mean just O2 sensors. I think two sensor were used in 96+, but Im not for sure on that. When two were used, one was on the rear exhaust manifold and the other was after the cat, I think Quote Link to comment Share on other sites More sharing options...
Bear Posted October 14, 2003 Author Report Share Posted October 14, 2003 HO2S aka heated O2 sensor aka 4 wire. I know one for sure is on the crossover, but I believe there is another one somewhere. Quote Link to comment Share on other sites More sharing options...
cutlassdude96 Posted October 15, 2003 Report Share Posted October 15, 2003 there is only one O2 sensor on the pre 96 engines Quote Link to comment Share on other sites More sharing options...
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