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Im having a multiple or #5 misfire. I have replaced the spark plugs and still getting the same code

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  • Jeremy W.
    Jeremy W. May 26, 2011

    Year, make, model, engine size?



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  • Ford Master
  • 3,640 Answers

A multible misfire could be wires, coil.

  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer. If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back. if you smell rotten eggs smell in exhaust, its a bad covertor. hope this helps you ! have a great day !!
  • Posted on May 26, 2011

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    • Ford Master
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    Is this a Ford 5.4 liter Engine (TRITON)?

    There are 3 steps that you need to do, Do a Compression test of 1, 3, 5, 7 and annotate the compression but this is what you are going to find

    There is ZERO COMPRESSION on #5 Cylinder. The problem you are having is common but not widely known. If this is the 5.4 Liter engine, you will find that the Valve Cam pushes on the Valve Stem and it has slipped off and causing your issue.

    Other Issues can be
    a. Coil Pack, Swap with another Cylinder and see if the problem follows
    b. Clogged Fuel Injector, Swap with another Cylinder

    Once you find out where the problem moves, you can repair or replace the problem. If it is the Cam/Valve Stem Rocker, then you have to pull the Valve Cover and put the Rocker back on, there are keepers now available to protect it from happening...

    Posted on May 26, 2011


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