Truck won’t start when engine is hot only when is cooled down 4.7

[jeovanicorro]

02 4.7 ram engine just got rebuilt and truck turns on and runs fine until i turn it off after its been at operating temperature if i let it sit for like 5 minutes and try cranking it it only spins i haven to let it cooldown and it starts back up without any problem i swapped out the fuel pump today and also got new injectors aftermarket not oem.

 

[GTyankee]

Sounds like a Low or dead battery
Maybe even an undersized battery

 

[jeovanicorro]

i have the battery under warranty! so i’m heading tomorrow to my local autozone and getting it replaced it’s an AGM 65 that’s the size of the third gen rams

 

[jeovanicorro]

swapped the battery out and still doing the same thing also replaced my terminals i’m thinking the injectors i have are bad there not oem because the truck would start fine if i pour gas into the tb it starts back up and drives normal

 

[3pedals]

Had similar issue on my ‘08…ended up being wires under driver side of firewall that supply power to fuel pump There was a connector with loose wires that would cause the same issue…always fired up cold, but it shut down warm wouldn’t start until after sitting for a while. Other thing to check is fuel pump relay…not sure if separate or integrated into TIPM on your 2002.

 

[jeovanicorro]

it was my injectors the chinese aftermarket ones bad quality i put my oem ones back on and worked fine