95 Chevy Silverado 5.7l tbi rough start, idle, acts like it's flooding then dies.

[JimGotfryd]

Will start cold, idles a little bit rough, will rev up nicely. As it warms up the idle gets worse won't rev up then dies. Acts lie it's getting too much fuel. Injectors look like they're spraying a lot of fuel. New injectors, fuel pressure regulator, idle air control, map sensor, temp sensor, ignition control module, EGR valve, and ECM. Also have new plugs, cap, coil, rotor, starter, serpentine belt and tensioner, fan clutch, alternator.
Truck ran fine, always dependable. Sat for a year after Dad passed, now it won't run more than a few minutes without loading up and dying.

Cousin was just here and thought it might be the fuel return line plugged or kinked. Restricting the flow could cause the same issue. Possible?

 

[WICruiser-97]

Look at the plugs to see if you can confirm that it is stalling rich/flooding.

Your description sounds more like too little fuel once it gets off the cold start fuel delivery map.

 

[PlayingWithTBI]

Check your CTS next to the T-Stat on top. It tell the ECM the engine temp. If it's (or the wires are) bad, the engine will think it's still -40 F and pour the fuel to it.

 

[JimGotfryd]

Check your CTS next to the T-Stat on top. It tell the ECM the engine temp. If it's (or the wires are) bad, the engine will think it's still -40 F and pour the fuel to it.

Got a new one in it. Wires look good too.

 

[JimGotfryd]

Look at the plugs to see if you can confirm that it is stalling rich/flooding.

Your description sounds more like too little fuel once it gets off the cold start fuel delivery map.

Plugs fouled with fuel.

 

[Schurkey]

Connect scan tool, verify EVERY sensor and computer output.

Assure that the injectors don't spray/leak when the ignition is on, engine not cranking or running.

Wouldn't hurt to verify fuel pressure.

Check the distributor for broken magnet by the pickup coil.

 

[WICruiser-97]

Would be a good idea to check that the fuel return line is not restricted.

Unfortunately "new" does not always mean "good" so a scan tool check of what the system is seeing for coolant temperature, etc. would be a good idea.

Is there more information available regarding why all the parts changes after it ran fine before sitting for a year?