2015 v6 mustang long crank time

[yaboinano]

2015 v6 mustang 69k miles. Past couple

days been having issue where my mustang takes longer to crank . It usually does it when the car has been sitting for couple hours example at night or after a shift at work . Other than those times the car starts right up . I have a video of the car taking long start . I changed my battery 3 days ago thinking that was the reason why but the issue still continues . I don’t have any codes showing up either .

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[Skye]

I don't have an answer, but that it happens after a pause makes me think it is fuel related. Either an injector is leaking down after the engine is shutdown or the fuel pump is unable to build pressure fast enough. A condition in which the vehicle has to spend additional time getting fuel pressure to an operational amount.

 

[Sioux444]

I'll offer up a comparison, though it seems a long shot and likely not a permanent fix. Similar situation on my 89 Chev throttle body 350 injector setup. Before starting the engine I need to cycle the fuel pump on twice, with just the accessories electrical feed. The engine fires right up. It doesn't want full ignition attempted immediately, or I get the long cranking situation.

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