I would also check fuel shut off Solenoid make sure it working
Check all your grounds they play big part with these trucks there is 2 or 3 grounds at right back on intakes bolt and the there is grounds straps right under a/c dryer one goes to back of head and other goes to the frame then there one for PMD on top IP and one off the right battery to the fender
Leroy Lenza who owns pmd cable .com is a real good guy and ships stuff same day. I was having some problems with a cable he sold me and he spent a good deal of time on the phone with me to get it sorted out. I bought a Stanadine pmd from him and relocation cable and my truck has run real good sense then.
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