First, your engine should be a V6, not a 4-cylinder.
Your fuel pressure should be: 48-55 PSI (Pounds per Square Inch)
Vent the fuel tank vapors by loosening the fuel cap. Position the ignition switch and the A/C system in the off position. Install a fuel pressure gauge to the vehicles fuel pressure valve. Confirm that no leaks are present, and with the key on, engine off verify the PSI reading on the gauge.
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