Will a cabin smell like fuel if a header is leaking?

[whataboutbob]

Originally Posted by kev0

Hi all, i found the problem. An injector was unseated and it was spewing fuel down onto the header. Beyond me how the car didn't go up in flames. I'm not sure what happened but it became unseated when I restarted my car due to my headunit not being responsive with Carplay, lol. As soon as I restarted my car, that's when the smell of fuel became apparent.

How did restarting your car unseat a fuel injector? All of the fuel injectors are held down by bolts....

[kev0]

Originally Posted by whataboutbob

How did restarting your car unseat a fuel injector? All of the fuel injectors are held down by bolts....

Exactly..that's why i'm really confused. Maybe the vibrations from the exhaust loosened it enough to be unseated.

I did not smell the fuel UNTIL I restarted my car.

[whataboutbob]

I don't think that the exhaust has enough mass to vibrate the engine, I'd expect that it'd be the other way around.

If the injector became unseated, the bolts MUST have been loose, OR someone touched them and didn't put everything back together correctly.

The DIs are held down by a very heavy fuel rail, and large/long bolts.

The PIs are held down by the LP fuel rail, they all have seals that are placed in such a way that they overlap the PIs by 5-10mm, decent size bolts, and don't really have any way to become unseated if installed correctly.

There has to be more to this story.

[Ultramaroon]

Originally Posted by whataboutbob

There has to be more to this story.

I appreciate your persistence. I cut my losses as soon as I read "magically unseated injector" but I'd still love to be wrong.

[kev0]

I wish there was more to it. The injector rails hasn't been touched since I had the DW 700's installed around 2020. I don't work on my own car at all except super basic maintenance.

I know a car restart shouldn't be able to unseat an injector but it literally started spewing out fuel after I restarted my car.

Maybe it's a super big coincidence but it just started leaking after a restart of the engine.

[Ultramaroon]

Originally Posted by kev0

I wish there was more to it. The injector rails hasn't been touched since I had the DW 700's installed around 2020. I don't work on my own car at all except super basic maintenance.

I know a car restart shouldn't be able to unseat an injector but it literally started spewing out fuel after I restarted my car.

Maybe it's a super big coincidence but it just started leaking after a restart of the engine.

All good. I'm going to say that the PI fuel rail - which also holds down the injectors - had been loosening for a loooong time and finally gave way.

You are SUPER lucky to have caught it before going up in a ball of flames.


edit: oops... overexplaining. @whataboutbob already covered it.

[whataboutbob]

Originally Posted by kev0

I wish there was more to it. The injector rails hasn't been touched since I had the DW 700's installed around 2020. I don't work on my own car at all except super basic maintenance.

I know a car restart shouldn't be able to unseat an injector but it literally started spewing out fuel after I restarted my car.

Maybe it's a super big coincidence but it just started leaking after a restart of the engine.

Right on, that kinda makes sense. The bolts for the PI rail backed out.