My Suburan with 225k miles was running fine up to the time the trouble started. It was up to temp when I shut it down. When I attempted to restart, it would run for 2 sec’s and die. I could pump the gas to keep it going another few seconds. Had it towed home. Replaced the fuel filter and now I could keep it running if I would gently pump the gas. Replaced the in tank fuel pump, what fun, and it ran perfectly for 5 mins or so. Shut it down and thought I had fixed it. An hour later, I went out to start it again and it was back to just running if a I feathered, gently pumped the gas.
Then I replaced the Idle Air Control and Throtle Position sensor. Still no luck. It acts this way at any temp. I tried to move it by the “keep” pumping method, but under load she just wants to stall. Read the codes and nothing comes up.
I feel this is a fuel issue due to the fact that the filter and pump made changes. Now I guessing presure regulator?