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Q: got a code 43 and 51 one is knock sensor and one is ecm , memcal/prom fail.... on 1993 Chevrolet S10

bought new computer and no change in truck.. was attempting to degrease enging a bit and sprayed her down w degreaser and water. would crank but not seeming to take gas. allowed to dry for 3 days, compressed air on all connections and under dist cap... was told to chk all vacuum lines and cant seem to find a bad one... any info you offer is great... at a loss .
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