Ls help one more time, please!!!

[JJAB]

Guys I originally posted that I had a totally rebuilt 2000 6.0 LS that would not crank for more than 2 to 3 seconds. Well, this site came through for me because you all suggested that the tuner forgot to remove the VATS. This was true, he did!!

New issue, after re-sending the PCM to the tuner twice I am still experiencing this:

I do have the hot cam installed 218/228 DUR @ .050, .550/550 LIFT @ .050

First, I have to press the gas to crank the motor. Once the motor is running, it idles very low from time to time. Also, while its running, if I accelerate the motor, when it comes off of the acceleration, it dies or idles very close to idling and sometimes picks up to normal idle.

I was thinking that maybe the fuel pressure regulator is not operating correctly. But my first mind is telling me that the guy who tuned my PCM did not compensate for the cam that I have installed.

A little more info:

I have an original 1987 saddle tank installed with the EP381 corvette fuel pump installed flowing through the regulator located on the intake.

HELP GUYS!!!!