Check the FRPS while you're at it. If the diaphram has been ruptured it can cause symptoms such as you describe. In addition to the compression test I'd also perform a leak down test on any suspect cylinders. Normal compression on our cars is anywhere between 150-170, but the important thing is that all the cylinders are within 10% of each other.
Here is a quick run through on performing the compression test correctly (Stolen from another website.... Shhhh
):
1. Bring engine up to operating temperature.
2. Remove fuel pump relay.
3. Remove all eight COPs and spark plugs.
4. Open throttle body and affix so it stays open constantly.
5. Insert compression tester into cylinder #1.
6. Crank motor for about five seconds and record results.
7. Proceed through cylinders #2 to #8.
8. If any one cylinder varies from the other, try to squirt some oil down the spark plug hole and retest. A good retest would indicate bad rings or light damage to the ring lands.
9. If cylinders vary and oil solution does not result in higher numbers, do a leak-down test.
Don't forget the small stuff like disconnecting the fuel relay, warming up the motor first, or opening the throttle body, they all can impact the compression test results.
U.M.