ok i have a 98 ls1 with a vortech blower. i just installed a intank walbro255 fuel pump and it hardly runs, stalls out some, undriveable. but if i disconnect the maf it will run,drive down the road untill i go full throttle then the car boggs down and just will not go. i dont no if this is part of the problem but when i shut of the car my fuel pressure drops to 0.

the car ran fine before adding the new big fuel pump any help???

 

found problem

 

WELL....What was it???

 

What was the solution?