ive got an 89 toyota tercel that just wont pass ohio emissions, therefore i
cant drive it. its a carbureted 5 speed. the only part its failing now is
the nox test, its failing by almost 1000 ppm. ive replaced just about
everything i can on it. feul,air,oil filters. o2 sensor, pcv
i took the egr valve off and cleaned it and installed new gasket (it was almost totally clogged). i tried to clean the manifold where the egr goes as best i could, im sure its still dirty in there. it does burn a little oil which im sure doesnt help matters. would going for a valve job be my next step? or maybe a carb rebuild? the car runs great and its only has 150k miles which aint a whole lot for that car. the only problem i have with it is it doesnt always like to start when its hot, but after a couple seconds of cranking and hitting the gas pedal it fires right up. i just bought it as a beater work car to save me some gas money and to keep my truck a little cleaner ( i work construction). thanks for any help or insight guys.
got it fixed. replaced the cat and passed fine. that didnt help with not wanting to start when hot though.