Here's something you can try to test the fuel pump and/or fuel filter theory.

You will need to remove the plastic engine cover to see it but at the front of the engine on the right side at the top is a Schraeder valve (looks like a large tire valve) for the fuel rail. Turn the key to the RUN position and then press the valve insert as if you were releasing air from a tire, if only air or sputtering fuel comes out instead of a high pressure shot of fuel your pump is probably NFG. Change the pump. Obviously this isn't as good a test as if you had put a gauge on it but it's a good indication.

To check the fuel filter and/or check valve(s) for bleeding back the test is similiar and is only valid if it passed the first test. This time turn the key on for a couple seconds then off and wait 5-10 minutes. Leaving the key off check for fuel at the Schraeder valve if there is none or it only dribbles out the fuel filter/check valve is bleeding back. Change the filter.

These tests are valid for any fuel injected vehicle only the location of the Schraeder valve would change.

Also the fuel filter and fuel pump on these cars is very accessable so don't be scared to replace them yourself only basic tools and common sense needed. As a rule of thumb whenever you change a fuel pump the fuel filter would also be changed.