2012 V6 Pony Dies Intermittently - Ford Mustang Forum
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post #1 of 17 (permalink) Old 08-31-2013 Thread Starter
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2012 V6 Pony Dies Intermittently

I have a 2012 3.7 Pony. Yesterday the engine died out of the blue on the freeway. Upon trying to re-start, the starter would run for a few seconds and stop. The same thing happened today on a surface street at about 30 mph. The dealer can't find any codes and could not reproduce the situation. Does anyone have any ideas about this problem?

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post #2 of 17 (permalink) Old 08-31-2013
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List your mods.


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post #3 of 17 (permalink) Old 08-31-2013 Thread Starter
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No engine mods. I believe the dealership added an alarm system.
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post #4 of 17 (permalink) Old 09-01-2013
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Bad gas ??? Pour a bottle of Seafoam in the tank.

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post #5 of 17 (permalink) Old 09-01-2013
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Quote:
Originally Posted by Shane 2012 Pony View Post
No engine mods. I believe the dealership added an alarm system.
Any mods that aren't attached by double-sided tape are relevant.

Seconding the possibility of bad gas, but this is running off of very little information.

2011 3.7L Performance Pack (3.31 gear); BMR Springs (1.0, 1.25), Adj Panhard, UCAM, UCA, CABs, LCAs; Tokico DSP-12s; GT500 Strut Mounts; DSS AL Driveshaft; JLT Oil Catch; TSW Interlagos 20x8.5 & Falken 255/35R20 x 4; Audio Sys; Amsoil Sig Series 5W-30/EAO17; Pypes 3" Catback;
On the shelf: H&R SS (1.7/2.4); MM 11+ CC Plates;

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post #6 of 17 (permalink) Old 09-01-2013
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Quote:
Originally Posted by Shane 2012 Pony View Post
No engine mods. I believe the dealership added an alarm system.
Aftermarket alarms can be a big pain sometimes. It would be worth checking that out to make sure it is working properly.

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post #7 of 17 (permalink) Old 09-01-2013 Thread Starter
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I had thought about the possibility of bad gas. after sitting for a few minutes, it would start again. Now, it will start, run rough for about 20-45 seconds and die. there is an odd exhaust smell... possibly non-combusted fuel. I will get some seafoam tomorrow and try it. It looks to me like it has to either be fuel or computer related.

I have not modified anything, other than some striping and decklid panel... nothing that makes the car do anything but look different.

Also, intermittently, the service advancetrac message and lights would come on, about once a month for the past 4-5 months. Other than that, the car has run excellent.
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post #8 of 17 (permalink) Old 09-01-2013
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Sounds like really bad fuel, but as a second possibility, wasn't there an issue with a wire shorting under the rear seat that was causing intermittent shutdowns on some 11-12's?

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post #9 of 17 (permalink) Old 09-01-2013
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OK You said the dealer could not reproduce it... and that they can get no codes.
But it now sounds like you are saying it happens every time you try to run it... back to the dealer it would go IMHO.

If they are not able to get any codes even after seeing "intermittently, the service advancetrac message and lights would come on, about once a month for the past 4-5 months" then the only thing I can think of is somehow it's losing power to the ECU and thus cuts out and then has no power to set a code...

Also note: DO NOT PUT ADDITIVES IN YOUR FUEL read your warranty they "can" blame anything you add if there is any issue with fuel delivery.

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Some good advice here. Besides taking it back to the dealership don't tell them if you've put additives in your tank. You might try just going to a Shell, Chevron, or 76 station and top off with some Premium gas.
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From my experience that sounds like a loose connection some where. or possibly a animal chewed some wires. I would start at the battery and check connections on as many wires as I could see. and look for chew marks.

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post #12 of 17 (permalink) Old 09-02-2013 Thread Starter
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Thank you all for your input. I think we can rule out bad fuel. The car does not start at all now. It just turns and turns. It will go on a tow truck in the morning to the dealership. It now seems that fuel isn't even getting to the engine. (bad fuel pump or clogged filter maybe?) all lights and electrical seem to be working fine.
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Good luck, it will be much easier to diagnose now that its really dead.
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If the alarm system has a KILL feature, that's where I would start.

My money is on the alarm.

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The alarm wouldn't make it run rough

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2012 , 3.7 v6 , pony , power loss

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