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egr flow excessive

Discussion in 'Stock 1995 - 2001 Explorers' started by hazmat456, December 29, 2007.

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    1. hazmat456

      hazmat456 Active Member

      May 27, 2007
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      City, State:
      tomah wi
      Year, Model & Trim Level:
      1997 mercury mountaineer
      have had this truck for two years had code p0402 when i got it. Sprayed egr rod? with wd-40 and worked it back and fourth with flat blade screwdriver, code went away. six months later code came back, sprayed it again code goes away. did this again yesterday,light went off after a couple of drive cycles. Will this damage the diaphram? will somthing else last longer?

      97merc mountaineer 5.0 with the PITA to change egr
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