Has trouble running unless I tap the throttle a little bit. It runs pretty much without issue in higher RPMs. The vacuum line to the fuel pressure regulator is chewed up, so that may be my issue. A new fuel filter is on its way in, but other than that, I'm thinking about replacing the Idle Air Control Valve, and if that doesnt do the trick then the Throttle Position Sensor will be replaced next, and if THAT doesnt do the trick then I'll replace the EGR valve. If there's anything I'm missing, any help is appreciated. (=

 

Replaced fuel filter and now it idles for around 3 or 4 seconds before stalling.

 

Fix the vacuum leak that's known and see if that cures it. Other than that, get a can of starting fluid/carb cleaner/whatever, and spray it around the engine in different spots. If your RPMs surge when you spray a certain area, there's your vacuum leak.

 

What was problem and was it a leak

 

Did you fix the problem. I have the same problem on my 350 tpi right now. But it will stay on when its warmed up.

 

i'd guess vaccum leak, mine had a cracked line under the front of the plenum, and one hiding in the back. spraying starting fluid is a great way to find em as mentioned above.