Stumbling up hills

Discussion in '2009 - 2014 Ford F150 Truck Forum' started by Grudge Match, Apr 10, 2016.

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  1. Grudge Match Founding Member

    When the truck is in 2nd or higher if I'm giving it just a little throttle it stumbles now and then. Its just a hesitation for a split second. I tried to pull codes from it but got nothing. It does it every day now since last week. Could it be the transmission slipping? What could do it that won't set codes?

    Oh its a 2009 with a 5.4L.
     
    Grudge Match, Apr 10, 2016
    #1
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  2. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Transmission slip is rare unless it's very high mileage. You can tell if that's happening by watching the RPM gauge it would jump for a split second. It's far more likely it's a misfire. It has to happen enough for the PCM to pick up on it frequently enough for it to decide to set a code, so that's why you may not be getting codes. If your scanner can datalog, log misfire events to see if that's what's happening.
     
    FTZ HAIC, Apr 11, 2016
    #2

  3. whomrig TOTM Winner Founding Member Southwest Chapter

    possibly a lean condition
     
    whomrig, Apr 11, 2016
    #3

  4. dustybumpers Article Contributor Founding Member

    have you changed the fuel filter lately?
     
    dustybumpers, Apr 11, 2016
    #4

  5. Grudge Match Founding Member

    I thought they switched to a life time in tank filter? I sure hope its not the filter because I don't want to drop the tank. I'll get under there to see if I can find a filter outside the tank. I'd never changed it because I thought it didn't have one.
     
    Grudge Match, Apr 14, 2016
    #5

  6. FTZ HAIC Staff Member Oregon Chapter Founding Member

    Yeah, they got rid of it in 2009. From the owner's manual:
    "Fuel Filter - Your vehicle is equipped with a lifetime fuel filter that is integrated with the fuel tank. Regular maintenance or replacement is not needed."

    If it were me I'd put an external filter on it inline. But anyway it ought to eventually throw a code to let you know what's going on. Sometimes it just needs enough data to know it's non just a transient problem but something that's not going to go away.
     
    FTZ HAIC, Apr 14, 2016
    #6

  7. dustybumpers Article Contributor Founding Member

    Didn't know that.
    Not happy, I'd put in a inline

    That aside, is there a place to hook up a fuel pressure guage, and check pressure?
     
    dustybumpers, Apr 15, 2016
    #7

  8. MCDavis Founding Member

    How many miles on the plugs? Could be that you're sensing a little misfire and the truck's pulling timing in an attempt to compensate.
    Is your fuel mileage down also?
     
    MCDavis, Apr 28, 2016
    #8
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  9. dustybumpers Article Contributor Founding Member

    BIG C!!!!

    Welcome back dudddde!!!!!
     
    dustybumpers, Apr 28, 2016
    #9
    MCDavis likes this.

  10. Grudge Match Founding Member

    It was misfire! Took a while but it finally set a P0300 then a couple days after that a P0301 and P0302. I think its coils because I cleaned up under the hood a couple months back with a water spray bottom. I was careful with the water but maybe some got into the coils somehow?
     
    Grudge Match, May 11, 2016
    #10

  11. JWC 3 TOTM Winner Founding Member

    Not good to wash these without extra steps. Water gets in the plug wells causing misfiring.
     
    JWC 3, May 11, 2016
    #11
    56panelford likes this.
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