2011 V6 Dies and Won't Restart - No Code! - Mustang Evolution

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Old 03-12-2016, 08:47 AM   #1
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2011 V6 Dies and Won't Restart - No Code!

2011 V6 convertible with 38K miles. Here's what happened - in early January I took the car out for some errands. On the way home I stopped for gas and, when trying to leave the station, the car just died. It would not restart, except for a few attempts when it would idle roughly for a second before dying again. There was no CEL. I had the car towed home and put the code reader on it, still no trouble codes. On advice of the mechanic who rode along with the tow driver, I tried pulling the battery to reset the ECU and unplugged the MAF sensor. It still wouldn't start.

Since it's an extra car I just let it sit. A week later it still wouldn't start. Two weeks after that it started and ran just fine. Still no CEL or stored codes. I drove the car a few times over the next several weeks and it ran fine.

Last weekend it died again, but finally restarted after sitting for a half hour.

Any ideas what the problem could be? I hate the idea of going to the dealer to have them try to troubleshoot an intermittent problem so I'm hoping someone here has had a similar experience might be able to guide me.
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Old 03-12-2016, 08:51 AM   #2
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Fuel pump maybe.
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Old 03-12-2016, 10:44 AM   #3
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Question: Is it still on that same tank of gas? If so try adding a bottle of HEET to it and see what happens. It's very inexpensive and in the off chance you somehow got water in your tank it will help get rid of it.


It's probably not it, but I like to start at simple cheap solutions to eliminate possibilities.


Good luck and keep us posted.
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Old 03-12-2016, 01:35 PM   #4
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would like to share an idea? maybe put diseal instead of gas sometimes it happens


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Old 03-12-2016, 01:37 PM   #5
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Quote:
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would like to share an idea? maybe put diseal instead of gas sometimes it happens


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I agree that it seems like a big coincidence that it happened immediately after a fill. Worst come to worst, my have to remove the tank and drain it?
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Old 03-12-2016, 02:26 PM   #6
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I'm thinking bad gas, or like others said, maybe you've got diesel or some water in the tank.

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Old 03-12-2016, 02:45 PM   #7
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2011 V6 Dies and Won't Restart - No Code!

Diesel nozzles won't fit into the filler hole, and if there were diesel in the tank the car would not have started up and run just fine like you said it did later on. It would be a really nasty scene.

There's something else going on there.

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Old 03-12-2016, 03:37 PM   #8
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had that happen to a customer of my dads shop he put diseal in his car n car ran until it got to hot n engine seized but thats a good point nozzle not gona fit in the mustang.... did the car crank over ? or was it turning n not starting? could be ignition key if its not turning over or starter


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Old 03-12-2016, 05:49 PM   #9
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You said "I stopped for gas and, when trying to leave the station, the car just died." How much fuel was in your tank when you stopped? If you had a 1/4 tank or so left, it seems unlikely that if it were bad gas it would cycle from the tank to the engine that quickly. If after some time it ran fine (on that same tank) then crapped out... But like someone else said, easy things first. The dealer will likely drain the tank first in trouble shooting so I'd start there too.
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Old 03-12-2016, 05:51 PM   #10
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My first thought when I read this last night was Pats Key, but it started and sputtered. After thinking more about it is when I thought Fuel Pump or the screen on the pick up.
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Old 03-13-2016, 09:34 PM   #11
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I had a truck do this to me, and it ended up being a packed strainer on the fuel pump?
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Old 03-14-2016, 06:15 AM   #12
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Well? What fixed it. Was it a bad tank of gas or what?
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Old 03-14-2016, 08:08 AM   #13
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Thanks all for your input. My first thought was bad gas so I added drygas as soon as I got the car home in January, then another bottle last week. But I don't think water in the gas would allow it to run fine one minute then not start the next. The possibility of a clogged screen or filter makes sense, as does an intermittent fuel pump issue. I guess it's time to look into dropping the tank next.
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Old 03-14-2016, 08:35 AM   #14
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Im not 100% sure but I think the water drops to the bottom so if it is in there it could do just that. Those were the exact symptoms of my snow blower when I got water in the tank. I know it's not the same but just saying.

Dropping the tank will let you get any water out and see if there's an obstruction so hopefully that does the trick!

---------- Post added at 08:35 AM ---------- Previous post was at 08:35 AM ----------

Im not 100% sure but I think the water drops to the bottom so if it is in there it could do just that. Those were the exact symptoms of my snow blower when I got water in the tank. I know it's not the same but just saying.

Dropping the tank will let you get any water out and see if there's an obstruction so hopefully that does the trick!
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Old 03-15-2016, 11:51 AM   #15
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OP - Read this article... it has a part on water in the tank and explains why you will likely have to drain the tank if it is indeed the issue.


water in tank
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Old 03-15-2016, 04:32 PM   #16
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Having been in the car repair business for forty years, I'll wager that
you have a bad fuel pump. About 1/4 of the Ford fuel pumps we see go bad at my shop go out immediately after filling the tank. I'm not sure why that is but it is very
common for Ford fuel pumps to do this. The next time it does it, put your ear up to the gas tank or fill neck while someone hits the key and see if you can hear the
fuel pump running when the key is cycled to the run position. Most likely when it does it you will find that if you bang on the bottom of the gas tank with your fist it will start.
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Old 03-15-2016, 04:58 PM   #17
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Old 03-16-2016, 04:04 AM   #18
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Quote:
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Old 04-10-2016, 04:25 PM   #19
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So here's an update...
I drove the car twice over the past several weeks and both times it died while stopped, but restarted after sitting for 10-20 minutes. The fuel pump did its usual whirring with the key on - no noticeable difference between a good start and when it fails.

Got all the fuel drained this morning. What a pain that was... you can't get a siphon tube down the filler so I had to go through the floor under the rear seat and open up the level sensor and fuel pump. Before doing that I pulled the fuel pump relay and cranked it over a few times. There was no sputter or any sound of an attempt to ignite that way, in contrast to the brief, rough sputter I would get when trying to start it normally after stalling. Another indicator that it may not be the fuel pump. Anyway, after I put everything back together and started it up the computer said I had 8 miles to empty so I added 5 gallons of fresh 93 octane gas. I ran a bunch of errands, with lots of stops and starts. I tried gentle cruising and some WOT runs. I did everything I could to replicate the situation where it previously died. So far so good! Let's hope this is the end of this one.
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Old 04-10-2016, 09:50 PM   #20
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Fingers crossed, but I think youre in the clear. Water in gas does exactly what your car was doing. How the heck enough got in to kill your car is beyond me, but you might not want to use that gas station anymore.

Keep us posted!

---------- Post added at 09:50 PM ---------- Previous post was at 09:49 PM ----------

Fingers crossed, but I think youre in the clear. Water in gas does exactly what your car was doing. How the heck enough got in to kill your car is beyond me, but you might not want to use that gas station anymore.

Keep us posted!
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Old 04-15-2016, 01:32 PM   #21
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RESOLVED

Draining the gas did it. Saturday after running around all day I was feeling confident, so I packed the wife and kid into the mustang for a three day road trip up to Maine. We did almost 500 miles and the car ran great. Looks like it was bad gas after all. I guess it's time to tell everyone in the neighborhood that I have free gas for their lawnmowers...

Thanks to everyone for their input, suggestions and comments!
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