I haven't been updating my posts for a while been stressed out moving into a new place. So I haven't had time to fix my truck or even look at it. One last shot for anybody with any input to maybe give me some guidance towards an issue.

REPLACED PARTS:
-fuel pump
-fuel filter
-fuel pressure regulator
-o2 sensor
-egr
-distributor
-ignition coil
-plugs
-plug wires

I've also swapped from another running 4.9 the IAC and the TPS, nothing changed. I'm getting the proper fuel pressure, too. It has a hell of a time starting up cold, usually have to turn the key off once or twice before it will fire up. Once it gets going it's good drives nice but with a tad of hesitation. With this hot weather the past couple days I've noticed it acts up a little more at times. Hardly started from warm yesterday and smelt super rich and took a lot of gas pumping etc... to get it finally back to being half driveable. So stumped, I've asked a real mechanic about it, seems pretty stumped, too. Not throwing any codes at all. Have not found any vacuum leaks either. Just want it to run like normal again! Any input is GREATLY appreciated, don't want to get bent over by a shop for labor charges chasing what is probably going to be something simple..

 

No codes at all or do you just get the 11 or 111 all clear codes?

 

Just the system pass code 111

 

There are times when a sensor is not completely out of range to trigger a code. I would measure the Engine Coolant Temperature (ECT), Manifold Absolute Pressure (MAP), and Air Charge Temperature (ACT aka IAT) sensors.

The expected values can be found here: Oldfuelinjection.com