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1998 Ford Expedition Question: Oil pressure rises high then suddenly drops and water temp shows hot veh not hot

 

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Pull my hair out, 5.4L V8, Las Vegas, NV, April 16, 2014, 21:39
 Rookie

Replace battery only after 11 mos. while driving oil pressure climbs to high and all of a sudden drops and water temp shows hot. Drove with scanner and read water temp normal 198 degrees this all happened right after battery replaced any ideas.

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  • Answer #1

    lightsaber April 17, 2014, 03:09
     Journeyman

    Disconnect and clean the battery posts, and terminal clamps then reconnect. Afterwards complete a drive cycle to allow the the pcm to relearn the engine and transmission. Your owners manual should have the drive cycle under battery replacement section.

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