Why doesnt My 3SG-E in my 86 GTS doesnt have an O2 sensor on the exhaust mainfold....i have seen some other same engines :?
88-89 engine's have the o2 sensor after the downpipe, 86-87 have it on the manifold. The GE in your car may have been replaced with an 88-89 at some point.
Yep. The 86-87 had it in the exhaust manifold and you could reach it from the front, standing up. For the 88-89 3SGE, it's underneath in this Godforsaken location on the front pipe: Note: this pic is misleading, you can't reach it from up top.
