Cold or hot, 75% when I start my truck it sputters and spits and I get a bad fuel burning smell from the exhaust while it idles unless I hit the gas and then usually the idle will smooth out. Sometimes it starts up fine. Sometimes when I hit the gas it sputters before the rpms climb. At stop signs or red lights when I hit the gas to go it sputters and then will take off like a missel. If I have the wheel cut all the way while either going in reverse or forward it bucks like it wants to stall but never does. Tune up done a year ago which means I have about 20K miles on the new plugs, rotor and cap and wires, all ac delco so that's not the issue because I did a tune up to stop this from happening and it made it better but did not resolve the issue. Fuel pump and filter are about 7 months old and also OEM parts but I can tell you I have a fuel gauge issue. I seem to still be averaging about 18 miles to the gallon with 155K miles on her. Mobil 1 oil changed about 7500 miles with either a Wix filter or Mobil 1 filter when they are on sale. I am not burning oil and just had a ton of cooling system work done but that shouldn't matter. I have cleaned the throttle body and I have replaced the air filter about every 10K miles. I have used red line fuel injector cleaner and every now and then some sea foam every now and then but not helping. PCV is recently new. I have probably missed plenty of things I have done but any other options I might have would be greatly appreciated. Thanks guys and gals.:banghead:

Just because parts are new, doesn't necessarily mean that they're good and that they'll last forever. For example, your fuel pump, you can replace it, but if there's high resistance in the circuit, the longevity of the pump motor will be drastically reduced. It sounds like a fuel delivery problem that you're experiencing, possibly a pressure leak down issue.

Fuel pressure is not monitored by the On Board Diagnostic (OBD) system and therefore cannot set a Diagnostic Trouble Code (DTC), or illuminate the Service Engine Soon (SES) light.

Fuel pump operation:
The fuel pump circuits are designed to energize the fuel pump through a relay continuously any time the key is in the START position. When the key is in the RUN position the fuel pump will operate provided the engine is running. If the engine stalls, or is not running for any reason, the PCM/VCM will shut off the fuel pump approximately 2 to 3 seconds after the key is turned to the RUN position.

Fuel pressure test:
Install the fuel pressure gauge to the test port near the distributor. Turn the key to the RUN position but do not start the engine. While the fuel pump is running, fuel pressure must be 60-66psi. After approximately 2 to 3 seconds, the fuel pump will shut off. Fuel pressure must remain between 55-60psi for several minutes. A drop in pressure below 55psi indicates excessive leak down. The most likely place is the fuel pressure regulator, the lines under the upper intake manifold, or an injector.

Here is a link to an inexpensive yet ample fuel pressure tester: http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=92699