I have a 1996 Satern SL and I can't pass smog. Could the auto part store have sold me a EGR for an automatic when I have a manual transmission.
I replaced all vacuum lines, map censer,
throttle position censer, intake and
exhaust oxygen censer, VAC leaks,
radiator overfill tank. Spark plugs,wires,
and dual coil packs. And the EGR.
During smog co should be 0.05 % or ppm hc or hydo cardons should be fairly balanced, if co is high temp sensors can cause over fueling, (rich) leaking injectors,bad fuel pressure regulator can all cause high co readings. High hc readings can indicate vac leak (manifold) egr malfunction, near over heat,catylist below threshold, after cat ox sensor, if your car is high miles this is a common issue in these daewoo engines. Yes thats correct,daewoo got in bed w gm in 1987 sprint,metro, and even some pontiacs used this drive train. The engine may have seen its life span being eco friendly, sorry i wish i had a fix this problem solution for you.
Post your trouble codes if your check engine light is illuminated. Sounds like you wasted a lot of money blindly throwing parts at the car.
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