88 dodge lancer shelby 2.2 turbo 2. Ended up trying each one of the wires to the o2 sensor for the a/f ratio gauge. The white n one of the black both red furthest rich didnt move the other read lean and was bouncing but never bounces up to rich or middle like it should. Is the second hand gauge junk or did i fry it when trying different wirez? SECOND: My car smokes i believe blueish after i boost it up n get off the gas as its rumbling n def when i get back on the ggas normal. I was thinking the worst as in rings, seets... but thwn sombody told me exhaust gasket in the turbo is allowing it to drip oil into the exhaust sidee. Please help anybody. Thanks.