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Vacuum leak

Discussion in '2nd Gen - 2003 - 2006' started by Nick Falcone, Feb 19, 2020.

  1. BlackCoffee

    BlackCoffee Active Member

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    I did the same repair last year after a rebuild. Just used a little silicon hose.

    20190422_110646.jpg
     
  2. BlackCoffee

    BlackCoffee Active Member

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    Check the lines and the EVAP valve next to the brake booster. I replaced that recently. Didn't buy the expensive Ford lines, just used silicone lines and clips. Two different size lines. It is actuated by vacuum (the small line) which could give a misfire. Also, the one line in the EVAP routing goes to the upper intake manifold behind the throttle body. You could have a leak in the vacuum system there. Here is a picture before repair. Replacing my valve solved my 446 code, but I also replaced the lines.

    20190422_110628.jpg
     
    Last edited: Feb 21, 2020
    riphip and Hamfisted like this.
  3. Jdcline54

    Jdcline54 Active Member

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    That could definatly cause what you describe.
    Although it might not be the problem. The only way to know is to fix the issue causing the p0446
     
  4. Msport

    Msport Active Member

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    I also had to replace the yellow line off of the evap valve next to the brake booster (blackcoffee's pic), I don't remember the code I got, but the line was burnt and causing the code.
     
  5. Nick Falcone

    Nick Falcone Member

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    Hey everyone just an update because I forgot to do it when I fixed this issue. It was the EVAP control valve where the spare tire is. It went bad. 60 dollar fix. My misfire was another issue 2 coils went bad cylinder 2 and 3 also the last person who did the coils snapped the screws into the plenum on cylinder 6 and 7 so the coils vibrated up. Had to tap them out. Thank you for all your help!
     
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  6. Nick Falcone

    Nick Falcone Member

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    You were 100 percent right thanks for the help!!
     

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