Need some help troubleshooting

[OR VietVet]

I would suspect that Idle Air Control Valve, like @exp500 said. Remove and inspect inside the throttle body port where the valve pintle would move. Should be a clean smooth surface that is tapered. Can be clean with carb cleaner and a small brush. I would inspect the pintle shaft/spring area for filth and replace if needed or at least attempt to clean. Is there any CEL's?

 

[Eman85]

Sure sounds like it's starving for fuel. Do you have the gauge hooked to it when it dies? You say it maintains fuel pressure, what pressure?

 

[exp500]

Do you have a Spark tester? Test at Dist and at coil. Report findings.Should be bright white and hit flawlessly every time,no skipped sparks.
It sounds like truck sat 6 months or more so Distributor cap is now suspect. Use Delco/Delphi/United DCR -820x only.
If no spark, I will recommend other tests.

 

[east302]

How would I correct that?

Is the Security light staying on or blinking? Normal operation is for it to come on and go off within a few seconds of starting.

 

[exp500]

A fuel pressure gauge would also help. One Known problem on these is oil pressure switch failure. One way it fails is no or always power to fuel pump. Switch is hot at all times. 12volt +. Check fuel pump relay.

 

[Swagfu]

How would I correct that?

This video would help with the security issue.