2017 Shelby won’t start.

[Tru2Cali]

Anyone have trouble with their mustang not starting. I’ve taking it to the dealership 6 times and it starts every time there. It didn’t one time. The battery is good and it just acts like it wants to start then just doesn’t turn all the way over when the button is pushed. After 10 or 15 minutes it may start again. It happens when it’s cold or warm, after going to the store, gym and or the morning.

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[JakeLethal]

Anyone have trouble with their mustang not starting. I’ve taking it to the dealership 6 times and it starts every time there. It didn’t one time. The battery is good and it just acts like it wants to start then just doesn’t turn all the way over when the button is pushed. After 10 or 15 minutes it may start again. It happens when it’s cold or warm, after going to the store, gym and or the morning.

Are you taking it to the same dealer? If so, I'd recommend trying a different one. That doesn't seem normal.

 

[pilotgore]

Anyone have trouble with their mustang not starting. I’ve taking it to the dealership 6 times and it starts every time there. It didn’t one time. The battery is good and it just acts like it wants to start then just doesn’t turn all the way over when the button is pushed. After 10 or 15 minutes it may start again. It happens when it’s cold or warm, after going to the store, gym and or the morning.

When the dealer starts the car, was it just driven there by you, or had it sit overnight?

When I’ve had this issue in other cars, it was either a faulty in-tank fuel pump, or a bad relay going to that pump (not allowing the pump to turn on prior to startup to Pre-pressurize the system).

In my experience (and it could be totally different with this car....)The low pressure electric pump feeds the high pressure engine driven pump. Without the low pressure pump charging the system, the engine driven pump can cavitate, so fuel pressure will never build in the rail.

When you get the car to start and run (after a failed attempt or lots of cranking), can you turn it off and then reliably start it back up right away? Usually, once fuel has successfully been fed to the high pressure pump, your problem disappears until the system depressurizes (can take hours). The best way to determine if fuel is the problem is to have the dealer test fuel pressure at the fuel rail prior to then after startup.

I could be way off.... but without more info that’s where I’d start looking.

Best of luck.

edit: I just re-read your post. You say it acts like it wants to start but doesn’t turn over sometimes... will it actually crank for a few seconds then stop, or does it fail to crank? A few times now after coming off track and shutting down, I’ll have a failure to start the next time I try to fire up, although it always starts on the second try. I chalk this up to the fuel being super hot in the engine bay, expanding, and having some cavitation in the pump briefly. The car only cranks for a few seconds then stops. The second start attempt it fires right up.

 

[MikeR397]

Anyone have trouble with their mustang not starting. I’ve taking it to the dealership 6 times and it starts every time there. It didn’t one time. The battery is good and it just acts like it wants to start then just doesn’t turn all the way over when the button is pushed. After 10 or 15 minutes it may start again. It happens when it’s cold or warm, after going to the store, gym and or the morning.

I had the same random starting issues, although my car did it usually when at the track between sessions when hot. It did this for a few months. My starter eventually fried, saw white smoke come out the engine bay, and left me at a gas station (I was able to have someone push the car with me to bump start it still dumping the clutch). I’m told the starter is not in a great position and exposed to a lot of heat, from the headers I think.

 

[Shift]

I've had this issue, but it was always only when the car was fully warmed up. It would happen randomly, and the worst part was it didn't throw any codes, and the starter always tested out fine. After multiple visits, the dealership just said F it and changed out my starter and I've never had a problem since.

 

[Tru2Cali]

I've had this issue, but it was always only when the car was fully warmed up. It would happen randomly, and the worst part was it didn't throw any codes, and the starter always tested out fine. After multiple visits, the dealership just said F it and changed out my starter and I've never had a problem since.

Thanks I think I’ll have them do that.

 

[Shift]

Thanks I think I’ll have them do that.

I hope it's resolved for you soon. It's not fun when you get in your car after you just finished pumping gas, and your car doesn't start and the station is packed. Happened more than once, and once is more than enough. They went through the whole gamut of tests(each of them requiring a dealership visit) from changing out the battery, to replacing the starter relay switch(if I remember this correctly, it's been a couple years) before they got to the point of just replace the starter and see if it doesn't help. My car is a 2016 btw.

 

[MikeR397]

Ya, a ford engineer told me the heat starts causing the starter to act weird and eventually fails like mine did.

 

[Voodoo Velocity]

Record your starting experience for the Ford tech since the car 'behaves' when you take it to the dealer (doesn't it always happen that way?). At least you will have evidence for the tech to review.

 

[G8rbcn]

Happened to me once in three years of ownership. At the track last summer in between sessions - pressed the starter button and nothing. Cussed a little, walked around, and got back in. Started right back up. Hasn't happened since.

 

[Alain]

When the dealer starts the car, was it just driven there by you, or had it sit overnight?

When I’ve had this issue in other cars, it was either a faulty in-tank fuel pump, or a bad relay going to that pump (not allowing the pump to turn on prior to startup to Pre-pressurize the system).

In my experience (and it could be totally different with this car....)The low pressure electric pump feeds the high pressure engine driven pump. Without the low pressure pump charging the system, the engine driven pump can cavitate, so fuel pressure will never build in the rail.

When you get the car to start and run (after a failed attempt or lots of cranking), can you turn it off and then reliably start it back up right away? Usually, once fuel has successfully been fed to the high pressure pump, your problem disappears until the system depressurizes (can take hours). The best way to determine if fuel is the problem is to have the dealer test fuel pressure at the fuel rail prior to then after startup.

I could be way off.... but without more info that’s where I’d start looking.

Best of luck.

edit: I just re-read your post. You say it acts like it wants to start but doesn’t turn over sometimes... will it actually crank for a few seconds then stop, or does it fail to crank? A few times now after coming off track and shutting down, I’ll have a failure to start the next time I try to fire up, although it always starts on the second try. I chalk this up to the fuel being super hot in the engine bay, expanding, and having some cavitation in the pump briefly. The car only cranks for a few seconds then stops. The second start attempt it fires right up.

I just learned a lot from this post !!!! Thank you !!!!

Good luck OP. Hope they figure it out

 

[MikeR397]

Happened to me once in three years of ownership. At the track last summer in between sessions - pressed the starter button and nothing. Cussed a little, walked around, and got back in. Started right back up. Hasn't happened since.

Right. It started exactly like this for me in year 3 and after lots of track events. By the 5th or so track day that it demonstrated the issue starting between sessions, on the drive home after an hour on the highway I pulled over to get gas. Hit start and white smoke out the engine bay and starter fried. Pushed it and dumped clutch to start and drive to the dealer for a new starter.

 

[Shift]

Right. It started exactly like this for me in year 3 and after lots of track events. By the 5th or so track day that it demonstrated the issue starting between sessions, on the drive home after an hour on the highway I pulled over to get gas. Hit start and white smoke out the engine bay and starter fried. Pushed it and dumped clutch to start and drive to the dealer for a new starter.

I'd just like to say the car never actually left me stranded with this issue. Starter would eventually work after a few minutes. That was a great job on manually restarting the car on your part.

 

[MikeR397]

I'd just like to say the car never actually left me stranded with this issue. Starter would eventually work after a few minutes. That was a great job on manually restarting the car on your part.

More track days, and it will ;). But ya one persons help and you can bump start it fine

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