1996 Firebird Formula here.

Fuel is appearing on the outside somehow. It doesn't spit fuel with the vac line disconnected. Could it be just the O-rings or is the whole unit bad?

Other symptoms include stumbling on the highway and an intermittent low idle. Car dies at stoplights sometimes.

 

Is the fuel seeping from the crimped seam where the two halves are joined - hard to tell from the picture?

 

I honestly can't confirm that 100%. I don't detect any fuel anywhere else so that was my first assumption.

 

I pulled the fuel rail and ran the fuel pump and (lots of) fuel did in fact run out of the crimped seam.

I replaced the fpr and all is well now.