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White smoke on warm start.

S650sunshine

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Parked for about 30minutes after long drive.
No leaks.
Coolant and oil is not dropping from last check.
AFR, Vacuum and pressure is normal.
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GrabThatBlue

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S650 Mustang White smoke on warm start. Schermafbeelding 2025-04-09 185406


You created 7 topics in total that are all similar or have to do with the same thing.
First it was blue smoke, now it's white smoke, then it was a valve seal leak, then your V8 sounds like a V6. This means that your first experience with your car when it came to smoke coming out of the tail pipe made you sick, and now you can't let it go because it's still not fixed. Please let me know if I'm wrong.

Since you have a brand new car, you should adress this to your dealer and if there is something wrong this should be dealt with. You still have a warranty on your vehicle.
You are walking with these issues for almost half a year now and trust me, once you feel bad about something on your car, it will only get worse. There is a part that is true,, but there will also be a mental part that will make you think that there is still something wrong with your car even after all the fixes.

I don't know you personally, but looking at all your threads you created, it looks like this car is making you sick but you are still holding on to it because you like the car despite the issues.

My advice again. Fix it through warranty and see if you still feel this way, otherwise you have to sell this car and buy another one.
 
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S650sunshine

S650sunshine

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Schermafbeelding 2025-04-09 185406.jpg


You created 7 topics in total that are all similar or have to do with the same thing.
First it was blue smoke, now it's white smoke, then it was a valve seal leak, then your V8 sounds like a V6. This means that your first experience with your car when it came to smoke coming out of the tail pipe made you sick, and now you can't let it go because it's still not fixed. Please let me know if I'm wrong.

Since you have a brand new car, you should adress this to your dealer and if there is something wrong this should be dealt with. You still have a warranty on your vehicle.
You are walking with these issues for almost half a year now and trust me, once you feel bad about something on your car, it will only get worse. There is a part that is true,, but there will also be a mental part that will make you think that there is still something wrong with your car even after all the fixes.

I don't know you personally, but looking at all your threads you created, it looks like this car is making you sick but you are still holding on to it because you like the car despite the issues.

My advice again. Fix it through warranty and see if you still feel this way, otherwise you have to sell this car and buy another one.
I don’t know if it’s really an issue. It runs with full power. Dealership said it’s normal. Even my neighbor’s son who is mechanic said it’s normal. If it was an issue don’t it throw off vacuum, afr, oil pressure, temperature etc?
 

GrabThatBlue

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I don’t know if it’s really an issue. It runs with full power. Dealership said it’s normal. Even my neighbor’s son who is mechanic said it’s normal. If it was an issue don’t it throw off vacuum, afr, oil pressure, temperature etc?
That's why, if they all say it's normal, then I wouldn't care too much.
Unfortunately I have never checked if mine does the same in hot weather after a 30 min drive.
 
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S650sunshine

S650sunshine

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That's why, if they all say it's normal, then I wouldn't care too much.
Unfortunately I have never checked if mine does the same in hot weather after a 30 min drive.
Yeah my guess it’s that it is fuel vapor. Everytime I parked even for 5minutes and start it again, it would perform like a cold start. I guess they just tune it that way for performance. Bunch of fuel being dumped and created smoke.
 


dusman59

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If Ford is dropping raw fuel on start up it would be black smoke. White smoke is water vapor. Many after market axle backs have no weep holes for moisture to drain. Short trips leave water that only gets burned off with longer trips or higher RPM's. You have great looking car. Just enjoy it.

Borla axle backs on my 2011 had no weep holes I drilled 1/16 inch hole in the front leading edge. This shows how much came out.
S650 Mustang White smoke on warm start. IMAG0249
 
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S650sunshine

S650sunshine

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If Ford is dropping raw fuel on start up it would be black smoke. White smoke is water vapor. Many after market axle backs have no weep holes for moisture to drain. Short trips leave water that only gets burned off with longer trips or higher RPM's. You have great looking car. Just enjoy it.

Borla axle backs on my 2011 had no weep holes I drilled 1/16 inch hole in the front leading edge. This shows how much came out.
IMAG0249.jpg
Mine pretty much straight pipes from the cats back. I only have 2 resonators for the quiet mode.
 

dusman59

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Resonators can retain moisture as well. One must drive enough to dry things out.
 
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S650sunshine

S650sunshine

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Resonators can retain moisture as well. One must drive enough to dry things out.
I doubt it because it’s straight pipes where the valve is at, only resonator for inside pipe.
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