fuel leak

[zdatsupra]

Anyone got any ideas on how to spot a fuel leak?.
On my supra the only evidence I have is fuel puddling on top of the first intake runner intermittently.It does not leak when I am watching and everywhere else is dry as I think it evaporates from all the heat.
I dont think there is any dye available for fuel is there?
What I just did was mist my fuel rail and injectors with flourescent chalk powder in the hopes the leak will wash it off and help identify it.
Ive replaced the orings twice with little difference.
Im going to move the injectors front to back to see if the leak moves.
Other than that Im finding the mystery leak bothersome and rather not wait until I have a engine fire before finding out where its at.

 

[zdatsupra]

well today, for the first time i think i spotted wetness ontop of the fuel rail. that leads me to believe its the an fitting and braided hose going to the rail.
last thing i need is a engine fire..

 

[zdatsupra]

well today, for the first time i think i spotted wetness ontop of the fuel rail. that leads me to believe its the an fitting and braided hose going to the rail.
last thing i need is a engine fire..

finally confirmed its the an adapter on the fuel rail.
the mating surface to the swivel seal fitting had a very tiny ding in it, smaller the half the size of a match head..
I tried polishing it but it did not fix it, very tight tolerance required..

It was hard to spot the leak because it only let a thin film of gas seap down the rail when its cold, whens it hot the gas evaporates and I could not see it, but when I wasnt looking the gas would puddle on the intake runner.

I suppose this is one way all those supra fires start, gas right next to the alternator..