Hey guys, I am hoping that someone can shed some light on my problem. So I have a 96 Chevy K1500 with a 350. Back in November I had the lower intake manifold, spider assembly, and new fuel regulator installed by a local garage with someone i trust. About a month and a half later it throws a check engine lights and runs for crap. Checked the code and it said cylinder 7 misfire. So I replaced cap rotor plugs and wires. It was good for about a week and then it started acting up occasionally with the same code. About 3 weeks ago I decided to check fuel pressure and aha there's the problem. I check it 3 different days and the first day when turn key on pressure would go to 58 and slowly dropped to 48. the other days it was 58 and 56. OK so it has to be fuel pump because reg is new, week ago replaced the pump and filter with Delphi. Fuel pressure is still 58. :craz28:Ok got the garage to warranty the reg and that was done yesterday and he didn't check the pressure after he was done. Today its surging and backfiring again occasionally so I checked the pressure and its still 58 When you start it pressure drops to 40 and if you rev it pressure goes up then back down. I sure hope someone can help because I'm at a loss. Thanks in advance everyone!