2002 Ford Taurus

Engine Performance problem
2002 Ford Taurus 6 cyl Front Wheel Drive Automatic 90000 miles

I have a p1237 code in my taurus, it at times usually after a long period of driving has low power and stalls at high speed, pull to the side and restart it is fine for a little while then it happens again. The only code in the ecm is p1237. Fuel pump secondary circuit, fuel pump driver module. I believe the module is behind trunk trim panel. Could this be faulty after it heats up? Could the fuel pump cause this to be faulty intermittently? Does the inertia switch come into this circuit? How do I diagnose this?
October 18, 2008.

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