<TABLE><TBODY><TR><TD vAlign=top width="100%">i have a 97 f150 4.2l with a 120,000 miles on it. when the truck warms up and sitting at a stop with the brake on i start to loose oil pressure, but when i touch the gas or shift into park it goes right back up, and is soild as a rock. i changed the oil pump and relieve valve.
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