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01 civic manual 1.6L. Had a vacuum leak on a fuel injector, turns out to be a cracked seal. Replaced it and installed the fuel injectors back right after cleaning them with fuel injector cleaner spray (using car battery to open the injector while spraying). All hoses and plugs connected, battery seems fine. I can hear the pump hum.

At first i can crank it and it starts for like a micro second then dies but i can keep it running if i press on the gas although it runs shitty. Now it just cranks and i can hear a loud whistling sound after. What seems to be the problem? All i can think of is that i somehow messed up the electrical of the injectors. Plz help. TYIA