My truck is a manual Nissan d21 or hardbody. It’s a v6 se model. I was having a problem where my trucks rpms would drop and it would rev super low and almost die. It got to where I couldn’t even tap the gas to get the rpms up as it would kill it almost instantly. The only thing I could do was start it and be pressing the gas. Even if I took it out of gear it would try to die. I had to keep the rpms up for it to keep going. Now it’s to where it will not turn over. Was able to spray brake cleaner into the throttle body and that would keep it going. So I believe the issue is a fuel pressure problem. Was able to get the bed off and test it by the fuel pump and was getting about 40 fuel pressure before it dropped. I’ve researched it a bit but wanted to see if anyone knew anything about it. I’m thinking it might be a fuel pump that’s going out or a fuel pump sensor. Thanks so much for your time. If you have any questions let me know.