Starting Issues

Discussion in '2011+ Mustang GT 5.0L Tech' started by TheSuit, Sep 29, 2020.

  1. TheSuit

    TheSuit VISIONARY

    141
    0
    I will preface this by saying that I am no tech guru so I appreciate any thoughts or advice that may be found relative to a starting issue I have been experiencing with my vehicle. The following are the details:

    Vehicle Details:
    • 2013 Mustang GT 5.0 Premium Convertible
    • 6 Speed
    • 75,000 miles
    • Recently replaced battery and spark plugs (after issue started)
    • Car is driven very intermittently as it is now a "weekend car"
    • No engine performance mods
    • No check engine lights
    Issue: (an example of what happens)
    • The car starts perfectly fine (after sitting for a week or two)
    • I drive the car 20 miles (mix of street/highway)
    • The car remains parked for 5-6 hours
    • When I go to start the car it cranks several extra times as if it is having a hard time turning over, and then (up to this point) will eventually start
    • The car drives fine on the way home with no noticeable issues
    • If I turn the car off immediately when I get home and then immediately turn it back on, it will start with no issue.
    What the heck could this be? Any thoughts on where I can start with troubleshooting or evaluating?

    I appreciate any help!!
     
  2. Juice

    Juice forum member

    1,645
    368
    Having a hard time turning over? Like slow cranking?
    First thought is a weak battery, as it starts fine after a drive.
    Measure battery voltage after it has been parked for the week and before attempting to start it.
     
  3. TheSuit

    TheSuit VISIONARY

    141
    0
    Up and till this last time it has cranked fine..just seemed to take a few extra. This last time though it sounded as though it was a slow crank.

    Thank you for your reply. I will certainly do that and see what the voltage is. I originally thought it was the battery but I replaced it and the issue has persisted.
     
  4. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
    57
    1,995
    538
    Could be the starter going bad, or merely turning slowly when it's heat soaked.
     
  5. Sugar Bear

    Sugar Bear Junior Member

    3
    0
    What was the condition of the spark plugs?. Did any of them in particular look gunked up or dirtier than the other spark plugs?? If so....
    You have a bad injector. And it might not show up on codes.
     
  6. race4food

    race4food forum member

    189
    5
    flaky starter. mine did that and Ford had already replaced the battery, cables, and something else. I replaced the starter and never had another issue.
     
  7. Iceman62

    Iceman62 Bullitt 6005

    814
    134
    Starter, or...injector/fuel issue. What's your fuel pressure looking like???
     
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