Unless your checking pressure output, you may need to have the pump inspected. The ways around this are as follows. But all get the same result.
You need to get a pressure gauge T'd into the line to see pressure. Here are a few options.
1) Go and get a 300 PSI liquid filled gauge from a HYD store and build the lines.
2) I sell a tester that screws to the OEM tank and has a gauge and nozzle built in.."Tester" these are 85 for guage, nozzle, cap, fittings, and simulator.
3) Buy an electronic pressure gauge that will read pressure. These are 220.00
4) Send pump to me for testing. Free for test.. shipping will cost you 12 each way.
5) Add a transducer to your alky kit and record it with the FAST(XFI). This way you can see pressure everytime you datalog. Kits are 140.
6) Buy a new pump that way you know what you have.
When cars get a little more serious with mods and you need to know.. you need to know. A stock Buick at 20 PSI boost and your car are diametrically different animals. Your fuse is very short and mistakes can happen quickly. My own pump every two seasons gets freshened(new diaphram, valves, seals, etc) . We started putting covers on pumps Dec 09 and that was to keep water from getting into the pumps motor. I dont know if your pump has a cover or not, if it doesnt.. that may be something else that could be going on and causing an issue. Pumps with covers only suffer from two things. Either trash gets into it or chemical reactions and then they leak. If the pump has any leak.. its down on output and needs service.
Hope this helps.
Julio