It could be the fuel pressure regulator - you do need to get a pressure gauge.

 

I suppose I can look into that, but I dunno what normal fuel pressure is, and if it is the regulator how do I tell its the regulator and not the pump that is causing a drop in fuel pressure?

 

I figured out that the rpm flutter that I was describing earlier only occured when the A/C was on. I just took it on a test drive and so far its running normally so if it dies again I can try to see if something else is causing this issue. Thanks for the help.

 

That could be a dirty or defective IAC - when the compressor cuts on it doesn't react fast enough.

 

That sounds like something else I should look into.

Anyways, the truck died on me again, but luckily I was in my neighborhood so I was able to walk back home and leave it to sit. Went back to it about 2.5 hours later and it started. Drove it home and parked it in the driveway to let it idle. After bout 10 min. of idling it died yet again. I am leaning heavily towards the fuel pump now. When turning the key you can hear a split second noise coming from the tank, but the truck won't start, or it will act like it wants to but simply won't. If I had a fuel pump gauge I would check what the pressure is, but I don't. Any other suggestions on where I should start looking? I've read the fuel pump relay, but is there a way to diagnose that as an issue without replacing it first?

 

Do you have anyway of checking to see if any codes(other than autozone) have been thrown? When my fuel pump went out (at the time I didn't know that's what it was) I used a superchips programmer and it showed the codes that led me to the fuel pump.

 

I am going to meet up with a friend who has a snap on ecm reader. What codes were you getting to lead you to the fuel pump?

Edit: just adding that the CEL has not lit up.

 

if you think it's the fuel pump...go on the fuel rail there is a schrader valve...take the cap off and press on the needle in the valve...that will give you an idea if there is fuel in the rail and if there is pressure behind it. Just my .02c

 

I've considered doing that, problem is now the truck is running fine. After my idling experiment in my driveway for 10 min. it died, but I let it rest for an hour only to have it fire up and idle for over an hour afterwards without dieing. Its so frustrating because of how hit or miss this problem is. Luckily I have other means of transportation, but pinpointing the exact problem seems to be more difficult than it should be.

 

A few years back there was reports of an unusual issue with wireing harness interference near the A/C canister at the fire wall area.
Take a look at the harness and use some tie wraps to dress the harness back away from the engine control harness or away from the canister to see if it makes a difference.
The A/C canister sometimes collects a high charge when the system is operating that may discharge, affect or put an interference signal on the ECM system.