2G Car nor starting after being warmed up

[Poppa1234]

So im running into this issue with my 95 talon tsi, when its cold the car starts normal but once the car is warm and I go to the gym (which takes a hour) and come back it starts like shit or doesn't at all. No amount of feathering the throttle helps as it will die anyway. There is a fuel injector seal issue in which it leaks a little causing misfire when idle. But does anyone have any ideas?

 

[a_common_weeb]

Also a newbie but I have a problem with my GSX hot starting too. I "Fixed it" by setting ECM link to prime the fuel pump for about 30 seconds to get rid of vaporized fuel in the rail, you can actually hear it go back into the tank in my car.
Supposedly worse with aluminum fuel rail isolators. (I have those)
Dunno if stock ECUs prime the fuel system when you turn the key to run, but if it does try priming a few times before you crank. See if that helps.

 

[Poppa1234]

Also a newbie but I have a problem with my GSX hot starting too. I "Fixed it" by setting ECM link to prime the fuel pump for about 30 seconds to get rid of vaporized fuel in the rail, you can actually hear it go back into the tank in my car.
Supposedly worse with aluminum fuel rail isolators. (I have those)
Dunno if stock ECUs prime the fuel system when you turn the key to run, but if it does try priming a few times before you crank. See if that helps.

Alright man ill give that a try. Another thing is it usually does this on hot days like 85+ but otherwise is fine.

 

[a_common_weeb]

Alright man ill give that a try. Another thing is it usually does this on hot days like 85+ but otherwise is fine.

That's about my experience too.
In the winter it actually liked being warm (duh) but as the weather changed it got worse.
Again I have those aluminum isolators, but I also have the Magnus fuel rail and I took the heat shield off the bottom of the hood because it was falling apart. Not sure if that matters but just something to note.

 

[danl]

If you are leaking fuel, there are multiple reasons this is a bad thing. Fix it.

Gasolene boils at 95-200 degrees F. This wide range is due to how it is blended. Ethanol boils at 173 degrees F. A hot engine easily surpasses these temperatures.

These boiling temperatures are quoted at standard atmospheric pressure. When you increase the pressure in the fuel rail, you increase the boiling point. When you shut the car off, you want it to keep the fuel pressure at least a couple hours, to avoid the fuel vaporizing. Check to see if the fuel pressure holds when you shut the car off. If it does not hold, fix the leak and you should fix the issue.

Common leaks are in the tank where the sender unit ribbed seal is and the check valve inside the pump. FPR’s and injectors can also leak.

 

[chrisman287]

I’d fix the fuel leak before anything. After that check the FPR.

 

[Poppa1234]

If you are leaking fuel, there are multiple reasons this is a bad thing. Fix it.

Gasolene boils at 95-200 degrees F. This wide range is due to how it is blended. Ethanol boils at 173 degrees F. A hot engine easily surpasses these temperatures.

These boiling temperatures are quoted at standard atmospheric pressure. When you increase the pressure in the fuel rail, you increase the boiling point. When you shut the car off, you want it to keep the fuel pressure at least a couple hours, to avoid the fuel vaporizing. Check to see if the fuel pressure holds when you shut the car off. If it does not hold, fix the leak and you should fix the issue.

Common leaks are in the tank where the sender unit ribbed seal is and the check valve inside the pump. FPR’s can also leak.

Ah I should've clarified here. The car does not have a fuel leak. The injector seal is sucking air in a little bit causing the idle to be a lil rough. At least I think that's why it's causing those little hiccups, but no fuel is leaking. The oil cap is leaking tho