92 Aerostar 4.0 Liter V6. Computer Code 179?

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92 Aerostar 4L v6. intermittent "check engine" light. recent rough running, stumbling. then very noisy fuel pump. pump replaced, MAF and intake plenum cleaned. runs like new. new oem plugs, new wires. however, "check engine" light illuminated briefly with warm, not hot, engine. what's up with that?