I have a 2001. 5 5-speed and have been getting errattic throtle response. After start up my fuel pressure reads 10 to 15 psi at idle until i give it a little push then it drops to 4 or less and remains down in that range. I have a Fass ordered and on the way, but from reading some of these other threads I think my vp is on its way out. I did the code check and these codes appeared, p1693 p0216,p0577. Any advice? 
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2001. 5 2500 4x4 HTB2 64/14 K/N air Edge juice W/attitude, Htt manifold,4in Banks Exhaust,120 EDMs, Buckstop Bumpers, 315/75 10ply Hannok MT3R

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2001. 5 2500 4x4 HTB2 64/14 K/N air Edge juice W/attitude, Htt manifold,4in Banks Exhaust,120 EDMs, Buckstop Bumpers, 315/75 10ply Hannok MT3R
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