No fuel pressure, so I had a stuck fuel injector on #1 cylinder and I replaced all four after getting them cleaned and pressure checked, they are Obd2 240cc on a P28 conversion. I recently replaced the fuel pressure regulator (today) AEM PR on an AEM FR and still have no pressure reading on the Ktuned pressure gauge.. The car runs but reading Zero pressure so I can't set the pressure regulator

 

Bad pressure gauge?

 

Dumb question, but do AEM rails come with the 1/8" NPT holes drilled all the way through, or are they only 90% drilled and tapped?