It won't run PERIOD with a broken timing chain (let alone start). When it did start, what did the oil pressure read? If it has good oil pressure, it doesn't need an oil pump.

sounds fuel related too

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84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)