Checked my fuel pressure at the filter and got a steady 10psi. Once the key is turned off it drops back to 0 in less than 30 seconds. The reason I bothered to check is the new plugs look very white which indicates I’m running lean. From what I’ve read 10psi is on the edge of being unacceptable, with 12-14 being ideal. Also the quick bleeding down of pressure I would guess is some sort of check valve no operating correctly. A quick run down of the truck. 1994 c1500 5.7 auto. I’ve rebuilt tbi with pod spacer, Tossed the stove pipe and pulled flapper, v6 intake tube(fender to air cleaner), k&n filtered air cleaner top, new plugs, wires, cap and rotor. Exhaust is stock manifolds to flow master y pipe no cat, 3 wire o2. I’ve done some other maintenance but nothing that should pertain to engine performance. It’s probably worth mentioning when I installed the v6 air tube the truck surged at idle for about 1min and then smoothed out. Currently the truck starts a little slowly but not bad(uh,uh,vroom). I’m sure that’s from the pressure bleed down. It’s getting about 15mpg and is running quite well for what it is. So without getting to long winded should I be looking to replace the pump? I’ve read to use the 96 and up Vortec pump. Will replacing just the pump and not the whole unit correct the pressure bleed down? Any advice? Thanks Mark