Something else to check...
For information....
This symptom is exactly like one I just encountered. The car would run fine for 10 minutes, then sputter and die. It would not start until it sat for about 20 minutes. This cycle would then repeat. In our case it was a plugged fuel RETURN line back to the tank. It was pluged and so the pressure would build and build until the pump could pump no more. Also it was noted that the car was not exactly runing fine put was running quite rich due to the increased pressure. After sitting the high pressure would bleed off and the engine would re-start.
Check the return line by plowing into it. It should be fee and clear (no back pressure) Yup I do like the taste of hi-test :)