Engine Performance problem
1999 Ford Escort 4 cyl Front Wheel Drive Automatic 91000 miles
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I have a 1999 ford escort se, and sometimes it idles really high , and shifts super hard. but sometimes it wont start at all, so i had it hooked up to a diagnostic machine and it said i need a fuel pressure sensor, i called to get one and aparrently there are two different ones, one in the tank and one on the fuel rail, how do i tell wich one i need, or could i just need a fuel pressure regulator? i need help!

Check the fuel pressure before you start buying unnecessary things. You might just need a fuel pressure regulator-I've looked for the fuel pressure sensor there's no listing having it-however there's an injection pressure sensor near the fuel injector no.1 on top left front of engine