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My HC PPM is reading too high and My NOx PPM is also reading to high. I took my car to a mechanic and he said I need to get a whole new engine. A fuel injection cleaner did nothing. The car runs prefect. I don't have anything leaking. Any suggestions?
 

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change o2 sensor. if the car is fuel injected clean the injectors. if it's carbureted make sure it's ok. it it has a smog pump make sure your smog pump filter is clean. change your charcoal canister filter. and make sure your not running too rich or lean.
 
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