Bear Posted October 14, 2003 Report Posted October 14, 2003 How many and where are the HO2S on a 94 3100? Quote
Robby1870 Posted October 14, 2003 Report 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
Bear Posted October 14, 2003 Author Report 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
cutlassdude96 Posted October 15, 2003 Report Posted October 15, 2003 there is only one O2 sensor on the pre 96 engines Quote
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