Rough idle to stall?

[BasedBidoof]

Alright so as of recently, I've been having an issue where sometimes the sho will stall out when I start it after running it for a bit. It'll start up really rough and then drop to around 600rpm and then stall out over the course of say 10 seconds or so.
I'm thinking it could be the fuel pump, since it's loud as **** when I turn the key to on. (also when I fill up from e it only takes 12gal when I have an 18gal tank on there...)
But hey what do you suggest I do?

 

[Devin]

Get it warm and then park it and put a pressure tester on the Schrader valve. See if the reading is out of spec (which I think it is supposed to be between 31-35psi, but it has been awhile since I looked).

 

[SHOdded]

Next time you have this problem, try starting with the accelerator pressed to the floor (fuel injectors cut off). It is possible you have a leaky injector(s) somewhere and flooding is occurring. Heat soak is a second possibility, try restarting after the engine has cooled down. Not sure about the CPS/CKS in this case.