Ok heres the long short. See mods below.

Got on the truck with both boxes on, ran great pulled great, lifted truck died. Pulled the VP wire for the PM3...it wasnt that. Engine just cranked and cranked. Got pulled home about a mile. When i was slowing to turn into the drive i let the clutch out in fourth and truck fired over. Had a rough idle like there was fuel puddled in the bowls. Revved and it cleared right up. Took it back out and it pulled good up to 2100, boggy from 2100-2800, then picked back up.

Just got on it again and when i lifted it sputtered to a stop. Now it will fire kinda(feels like its way to cold out type of idle) almost running on 1 cyl feel. Dies in about 2 seconds. No codes no nothing!!!!!

What could it be??

 

whats the fuel pressure look like?

 

The sending unit on the pressure gauge went about a week ago. I got a new one sitting here...but now it wont even start.

 

Mine has done this. When mine did this its because I was cavitating (sp?) the pump. Basically vapor locking the fuel lines. Your demanding so much fuel and then just letting off locks the fuel lines up. If it happens again crack a fe injector lines and have someone crank the engine. Look for foamy bubbling fuel coming out of the lines. If this is the problem it should start once you crack a few lines. I beleive this was happening because I had a few lines that weren't sealing to the injector tube very well.

 

I cracked 4 lines...some fuel would come out when i was cranking. Should i see fuel past the VP when the FASS is cycling? Even with doing that the truck wont start.