Fuel system

I`M NOTTHAT GOOD TO USE GAUGES, THOUGH FROM READING, THEY ARE NOT HARD AS LONG AS A FITTING WAS INSTALLED. I BELIEVE THERE IS ONE, THE READING SHOULD BE AROUND 50psi? The reason I do not buy it is only I would not use it so much. There are two instruments I need one for checking fuel. The other to read the computer. In a Buick I was shown how to jump the plug in turn on the key and read the blinks, someone gave me a small book to decipher their meaning. I had a situation there and the money at the time, it wouldn't run, after putting in the cam, crank sensor the distributer pack. The final was the computer module, installing my chip? At the store with plastic instrument, re installing back in car. I got nothing. Then I called a mechanic friend. Stupid way to find a problem, he said just to store my old parts in the new containers keep clean an dry. After all I did he couldn't read the computer because the fault message was in the old one. That's when he showed me how to jump the computer hook up? After all I had done he said, well all that`s left is timing chain. We got the car through the alley into my carport he left. I started pulling tire for access I removed what I needed sure enough the fiber gear on cam shaft lost a toothed chain jumped. But what got me was when I perched the new replacement kit. The new sprocket for cam was steel. Why hadn't the BUICK put on a steel one at first, ticked me off. I learned so much that week, even that the oil pump was inside the cover and not in oil pan. To others it was a stupid way to find and fix the car. But it ran like new. I told you that story to show how I loved to work on that car. I`m older now lower back may hurt when I`m under the hood, but I love to learn on my own and fix a problem, with the knowledge of people such as yourself. Unhooked fuel line and safely did a visual check on pressure, from seeing other out puts I truly believe the output to be great. But I will purchase a fuel gauge today. But just in case it`s this I perched a used pressure regulator. Yes it has a rubber diaphragm, but it was only $10. If response is good. I will pay the $65, or so from you for a new one. It used to be you could rebuild things. Seems today items are just throw away. Buy new. How much we waste. Shame. Please respond if you can decipher my writing and tell me if I`m going in the right direction? At least. SAM R.