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Engine Knocking, Rough Idle, Misfire? Video

Discussion in 'Under the Hood' started by keepthecoffeeon, March 24, 2018.

^^Searches ExplorerForum.com^^





  1. keepthecoffeeon

    keepthecoffeeon New Member

    Joined:
    September 21, 2017
    Messages:
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    Location:
    Phoenix
    City, State:
    Phoenix, AZ
    Year, Model & Trim Level:
    1999 Ford Explorer Sport
    Alrighty a little background.

    I recently put the following new parts on my 1999 4.0 OHV Explorer

    130 Amp Alternator
    Upper Intake Manifold
    Fuel Injectors
    Fuel Rail Gasket
    Replaced the EGR Tube O-Ring


    The first time I put everything back together my truck ran with no knocking at all. The issue was one of the O-rings on a fuel injector did not seat correctly into the fuel rail and subsequently was leaking fuel so I had to take everything off to fix it. :sawzall:

    Second time around I got everything seated correctly, all hoses and connections, etc. And now I have a terrible knocking noise in the engine and I for the life of me cannot figure out what is wrong.

    I've tripled checked my firing order for the spark plugs from the cylinders to the coil pack. :dunno:

    I've noticed when I disconnect the vacuum hose from the EGR valve the vehicle runs smoother for about 5-10 seconds, the knocking subsides somewhat, when I reconnect it knocks more rapidly.

    Fluids are all normal.

    The EGR tube gets extremely hot even if the car is only on for 30-45 seconds... I posted a video of the sound to maybe give you guys a better idea.

    I'm also not sure if its because the alternator is new but it smells awful :wtf:

     
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  3. keepthecoffeeon

    keepthecoffeeon New Member

    Joined:
    September 21, 2017
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Phoenix
    City, State:
    Phoenix, AZ
    Year, Model & Trim Level:
    1999 Ford Explorer Sport
    Any ideas fellas? Still haven't been able to figure anything out. I'm taking her apart Thursday to see if I can find anything.
     

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