GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Car wont start sometimes and i dont know why

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Old Mar 3, 2012 | 07:39 PM
  #1  
LVMustang05's Avatar
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From: Las Vegas, NV
Car wont start sometimes and i dont know why

Once in awhile maybe once a week i will go to start my car and it wont start and after a few tries sometime more it will finally start up normally.. The battery gauge says full and everything lights up normal so i guess it cant be the battery... Im trying to go down the line here trying to figure out whether it might be my clutch, spark plugs, starter, etc... Has anybody else ever had this issue or might know what could be wrong before i lose my mind!!!! Please help.
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Old Mar 3, 2012 | 07:57 PM
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I hear the fuel pump kick on so it might not be that either....
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Old Mar 4, 2012 | 08:31 AM
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What's does it do when it doesn't start? Does it try to crank over? Or does it click like a dead battery? Also, one simple thing to check if your car is a manual is make sure you're pushing the clutch all the way to the floor when you try to start it. The clutch sensor wont let the car start unless the clutch pedal is against the floorboard. I know that's caught me by surprise a couple times.
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Old Mar 5, 2012 | 08:38 PM
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^ if the car is manual. If the car is auto, check the park/neutral safety switch contact. You may just want to put the car in neutral and try to start it.

Also, the fuel pump issue was an air entrapment in a pocket from a poor mold geometry. Tiny bubbles accumulated in the pocket and after long drives the air went to the motor as one large void under throttle. If you never had your pump replaced under the TSB, then you may see that issue after long drive/parking and then starting the car.

Or, just try letting the pump do a full cycle before continuing with the key. Some times we simply don't allow the fuel pump to prime the motor before we turn the key.

Or, check your plugs for residue from oil ingress. After 52K miles, FORD recommends you clean/change your plugs.
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Old Mar 6, 2012 | 10:00 PM
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From: Las Vegas, NV
Thanks guys for the input it was just a loose wire from the battery to the starter.... I love easy fixes!!!
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Old Mar 6, 2012 | 10:02 PM
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11SHELBYGT500's Avatar
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Originally Posted by LVMustang05
Thanks guys for the input it was just a loose wire from the battery to the starter.... I love easy fixes!!!
:thumbs up:
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