The sensor with the green hat is the power steering pressure sensor. The PCM speeds up the idle when it senses high pressure, ie:turning the wheel when parking. That doesn't usually hiss. Maybe something else in the area.
"My Name is Richard. I am a Contouraholic."
1999 SE Sport Duratec ATX Spruce Green; Drop--In K&N Filter; VentShades;
Fog Lamp Fix Mod & PIAA510s with Bumper Braces & Stock Type aiming screw mod;
PIAA 9006 Super White Headlamps
AIWA CDC-MP3 HU; WeatherTech Mats
Viper 600ESP w/Remote entry
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