Engine cranking but not starting?

2013 HYUNDAI SONATA
110,535 MILES • 4 CYL • TURBO • 2WD • AUTOMATIC
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BLESSING EWOBOR
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The engine had a mechanical problem, it was replaced, however it is not running. Whenever the engine is cranked it will react as if it wants to start then continuing cranking, the process continues like that.
The engine has been scanner; there has not been any fault code.
There is spark, the fuel injectors are pulsing.
What can someone check for this kind of diagnosis?
Thank you for your support so far.
Jun 30, 2025 at 12:27 AM
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MECHTRIX
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Did the car run normally before the repair?
What was the mechanical problem it was having before the repair ?
What was the part that was replaced during the repair ?

Theres a few things that can disrupt the starting and or running process for this car. Answering these three questions will help a lot. Let me know. thanks ".
Jun 30, 2025 at 5:43 AM
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BLESSING EWOBOR
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The engine was running normally; the vehicle was driven to the workshop.
There was a knocking sound from the engine.
The engine was replaced completely.
Jun 30, 2025 at 1:41 PM
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MECHTRIX
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 382 POSTS
Oh, well that changes everything if it's not starting you might want to take it back to the shop that installed the engine chances are its something that requires further diagnostics to get a real idea on what's actually going on with it.
Jun 30, 2025 at 8:16 PM