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ECU's can fail but rare. Pin 19 and 25 are connected to the pump relay. When the ignition is turned on the ECU energizes the pump for 2 seconds, if it is then turned over it keeps it running until the engine is turned off. a failure of the ECU will result in a no start, but agian rare.
However yours does sounds like an electrical problem because you get no fuel pressure. The relay should click when being cranked
Vacuum issues if significant can also result in a non start, but these are more cold start related
__________________
Ron
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