Q: extremely rough starting

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I replaced my fuel pump and reconnected the pump to the sending unit housing using fuel line and it was very tight going on so I opted to not put on hose clamps. I replaced the fuel pressure regulator and fuel filter as well but am still having extremely rough start issues. Car will start but takes a while worth of cranking before will turn over. I am unsure if the hose not having clamps is causing a pressure drop or not . Could that be the issue or should I be looking somewhere else. The car is low on power as well like it is not getting enough fuel.

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