2014 D13 hard start when hot

Either a bad starter or more likely a bad ground connection. Probably on the block to the frame.
Cheapest thing to check at least.

 

Oh, okay. If it’s cranking fine then ya, some other issue.

 

Probably injector cups. Google D13 injector cups and you will see how common it is. Unless you are loosing fuel pressure somewhere, it’s probably the cups.

 

Cups need changed.

That is the exact, common symptoms of bad cups on a Volvo.

You're in the early stages of the leak development.... It will eventually get to where it's much worse ... Starting and loss of power , possible stall under load..

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Mine will do it on cold mornings.I combat it by leaving key on for 2 minutes before cranking.Not so much on 70° mornings though.Usually like others said you stop to take a leak,then it cranks a long time ,finally starts.Yes,Eventually(once the cups get bad itll do it all the time,and idle choppy,sound like crap.

 

Probably need injectors and cups as others have said. To decrease wear and tear on the starter etc use the manual fuel priming pump on the drivers side above and in front of the compressor, has a cap that looks like a turtle shell sort of(that's how the mechanic told me about it lol). Push down and twist cap, then not too fast pump until there is resistance and immediately start your truck. You can do this for awhile but do not do it for too long.