In the 60's, you could pull off all the "smog" stuff, and the car ran fine. Since about 1973, the engines have been designed to run with them, and there is very little, if anything to be gained by removing them. If you tamper with your EGR system, for example, your engine is likely to overheat. I would replace the defective parts as soon as you can, but that's just me.
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