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2005-2010 Mustang GT Tech Forum

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Unread 04-12-2012   #1 (permalink)
101 Pony is offline Rookie


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Default 2008 Mustang GT good battery-won't crank

Just got this 2008 in Dec.from a Ford dealership. Only quirk seemed to be tire pressure fault light until now. Put car away after hour long drive, two days later - won't start.
Turn the key and all dash lights come up, shows battery is OK. Turn to Start and nothing happens. So quiet I detect faint rapid clicking noise from the air vents after the key is back to ACC.

My first Mustang, should I look into buying a hand held code reader? The car is in my garage a long way away from any repair shop. Hope I haven't bought a lemon and this is just the beginning of my becoming a mechanic, problem by problem.
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Unread 04-12-2012   #2 (permalink)
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how do you know the battery is good? The gauge will show you have a good charge even if you don't. The gauge is useless, I would have the battery load tested and replaced if need be. You don't need a handheld code reader, but you do need a tuner then you can load a performance tune on the car and read and clear DTC's too.

It's probably the original battery in the car, if it's a 2008. I wouldn't put alot of time and stress into it, just replace your battery and you will probably be ready to roll.
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Unread 04-12-2012   #3 (permalink)
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So a tuner will read codes? I also have a 08 GT that has been giving random tire pressure error sensor codes. I'd like to read that, but I'm
also curious about loading a performance tune.


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Unread 04-12-2012   #4 (permalink)
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Quote:
Originally Posted by dynobrat View Post
how do you know the battery is good? The gauge will show you have a good charge even if you don't. The gauge is useless, I would have the battery load tested and replaced if need be. You don't need a handheld code reader, but you do need a tuner then you can load a performance tune on the car and read and clear DTC's too.

It's probably the original battery in the car, if it's a 2008. I wouldn't put alot of time and stress into it, just replace your battery and you will probably be ready to roll.
Thanks for the quick reply. I tried starting it again just to see what would happen. The stinker started right up. The battery seems strong. I am wondering if there is a relay in the clutch that is picky. I have had the car not start before and then seconds later start right up. There is also the strange 7 seconds of clicking in the dash that I can hear after shutting the car off and clutch disengaged. I bet something simple is happening. And yes, I have the clutch all the way to the floor everytime.:kooky:
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Unread 04-12-2012   #5 (permalink)
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I would guess your starter solenoid is going.
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Unread 04-12-2012   #6 (permalink)
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The clicking after shut-off could be the CDs in the Shaker 500 or 1000 radio. Sometimes Shaker head units will keep shuffling CDs until it completely runs the battery down. I always turn mine off manually before I shut the car off.

Bruce
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