Checking for fuel leak

[Bigrod330]

Ok..my system is on and 99% ready to go.  I put the battery back in and thought lets check that the fuel pump comes on.  It did, so thought lets check for fuel leaks while the pump is pushing air vs fuel.  Yes it connected to the tank complete but no fuel in it.  I can hear air hissing at the top of the plenum....thinking it from the secondary rail and or fittings.  I dis connected both lines, retaped the fittings and reattached...still the same hissing air.  What could this be...am I missing something.  Id rather catch this now before its FUEL leaking all over everything.
Can you all help? THANKS

[Bigrod330]

FOr got to mention...all fuel set up is AN fitting, braided lines, billet fuel rails.

[Busabob]

Ok..my system is on and 99% ready to go.  I put the battery back in and thought lets check that the fuel pump comes on.  It did, so thought lets check for fuel leaks while the pump is pushing air vs fuel.  Yes it connected to the tank complete but no fuel in it.  I can hear air hissing at the top of the plenum....thinking it from the secondary rail and or fittings.  I dis connected both lines, retaped the fittings and reattached...still the same hissing air.  What could this be...am I missing something.  Id rather catch this now before its FUEL leaking all over everything.
Can you all help? THANKS

Rod, do not run the pump without any fuel in it, it can score the inside of the pressure part of the pump .The gas acts like lubricant and keeps the pump from overheating

[Hit Man]

Yes put some fuel in it. It may be the o-rings on the injectors are not seated evenly into the fuel rail. Pull the rail off and check for pinch marks on the o-rings.

[Bigrod330]

Yea...I was only running it for 5 sec at a time if that.  I did put fuel in it and found the LEAK the hard messy way.  It was one of the injectors leaking at the top to the secondary fuel rail.  Pulled it apart to find the Oring had chunck out of it.  The rail has a rough rash on the edge and must have cut it.  Fast trip to advance auto after a quick call form PINKY ( THANKS ), and I was back in action.  They actually had a misc size Oring pachage for FUEL use...one in that was direct match.
All other lines.....good to go...Sounds nasty with NO dump pipes on it.  Off tomorrow to welder buddy to make the dumps.

Thanks all....specialy PINKY!