It sounds like the fuel pressure is dropping off, it is either draining the fuel line back into the tank due to a defective fuel pump or into the engine through a defective fuel pressure regulator. Either one will cause extended crank time, a defective fuel pressure regulator may also cause extended crank when it is warm and a rough idle for the first few seconds the engine starts as it would have to burn the excess fuel that is not supposed to be there.
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19 years experience fixing cars.
Many more years experience taking them apart to see what makes them work.
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