One of the major issues of the 993 is clogged secondary air injection ports in the cylinder head which causes a dreaded CEL light.  The thing is, the SAI system is only active on start up, and really is only an emissions thing to prevent excess hydrocarbons on initial startup.  The nice thing, is that the 95’s are OBDI and do not have a CEL light to trigger.  So most likely the majority of 95’s are running around with clogged …

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