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2003 Mercury Mountaineer Question: Compression loss, throwing codes...What is it?

 

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tat2dnurse, 4.6L V8, Alliance, OH, February 04, 2013, 17:36
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My mounty is throwing codes for 4 adjacent cylinders 1,2,3,and 4... The truck runs great when moving, but shakes at idle... its misfiring in all cylinders... had compression test done, and the cylinders are random from 120-170psi.. Uptown auto says they believe its my timing, and I need to replace all my timing components, but they can't tell unless the tear it down.. and that will be $1200 parts and labor... Is this the case, or something else? Im not sure what to do.. I dont want to spend 1200, and that not be the problem.. Thanks

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  • Answer #1

    pushrod February 04, 2013, 17:50
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     Master

    Get another opinion, don't sound right!! More likely a vacuum problem, same timing componets for 5,6,7,8 as well so-----!!!

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  • Answer #2

    Greg's Orange Auto (12184 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 05, 2013, 06:32
     Master

    AGREE WITH WETRY. THERE ARE WAYS TO TEST TIMING CHAIN ISSUES

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