Jimbo193

Forgot to add there’s no CEL codes

Hi everyone I need some Help with my 2007 Sierra 4.3 2wd. It ran great up Until about a month ago it randomly started to sputter and lose power. It would run ok for a few minutes then lose power, bog out when revved up then eventually stall out. Fuel pressure is around 60 with key turned and it holds there no leaks. Also I should mention that when it is first started now it runs great for probably 10 minutes then starts to act up and gets worse until it stalls. If I shut the engine off and let it rest for 10-15 seconds it’ll start up and run great again. Very odd Since then I have replaced a lot -Fuel pump (theres no Filter on this truck) -spider injector assembly. -spark plugs, wires, distributor, rotor, cap, camshaft sensor -crankshaft sensor -oil pressure sensor -purge valve the 1 under the hood and the 1 by the gas tank + solenoid vent filter -both upstream o2 sensor