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Emission Test fail on 1993 Oldsmobile Cutlass Ciera

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I have a 1993 Cutlass Ciera S. For the first time it failed to pass the emmissioms test.
The High Speed Results show:
The HC (ppm) at 171, Last Year was; 3
The CO % at 5.75, Last Year was; 0.01

The Low Speed Results show:
The HC (ppm) at 172, Last Year was; 21
The CO % at 5.91, Last Year was; 0.03
Inspector said he believes it running too rich and says he could smell fuel, is this an injector that is dumping fuel? If So how do I tell and how to repair?
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