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pinging on acceleration

Discussion in 'Under the Hood' started by two-fords, September 26, 2002.

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    1. two-fords

      two-fords New Member

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      City, State:
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      Year, Model & Trim Level:
      94
      Hello everyone,
      I have a 94 ford Explorer.
      I have had it tested ; coded out the computer.
      nothing shows up.
      The timing has been as far as advanced as 72 degrees.
      When on acceleration it pings and the if pings long enough the engine light comes on.
      When it is idling it runs a little rough.
      Homes Tuttle Ford said they could not find anything wrong with it.
      Could the timing belt be stretched a little for it to be off a little.
      Thank you very much
      Robert
      grabapawn@juno.com
       
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    3. Alec

      Alec Elite Moderator Moderator Emeritus

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      Welcome!

      I'd try cleaning your MAS. Many many threads about it on the board, and I think it's on the tips page also.
       
    4. 88vert

      88vert Explorer Addict

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      Try tightning your lower intake bolts:D
       
    5. two-fords

      two-fords New Member

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      Mas

      Hi Alex,
      Could you explain what MAS is?
      May I ask why you say MAS?
      thank you for your post.

      Robert
       
    6. two-fords

      two-fords New Member

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      intake bolts

      Hi 88vert,
      Could you tell me more about your thoughts on this matter? Why and where?
      thank you ,
      Robert
       
    7. 88vert

      88vert Explorer Addict

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      MAS is mass air sensor,the filiments could be a little dirty you will need a security torx bit to take out the screws then use some contact cleaner dont touch the filiment with your hands.Also your lower intake bolts could be loose causing the pinging,they are not the easiest to get at but you might want to check the torque on them:D
       
    8. 94expo

      94expo Member

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      Clean your MAF. I was Pinging on every passing attempt. I cleaned the MAF and haven't heard anything since.
       

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