where is the fuel pressure test port location on a 1996 silverado 1500 V8 central SFI models?

Misfire - at idle only - ‘usual’ suspects = Vacuum leak .... Low compression. ▪️There is a problem with the posted fuel system - “V8 central SFI”▪️ Always wise to post engine size .. It makes a difference - especially for someone that actually knows the differences! Good luck!

how do i check for vaccum leaks?

**WHICH** ENGINE? .... 6 OR 8 cylinder?

I didn't see the Schrader valve near the distributor i did see the fuel line near the distributor, can you give me another locations?

No I’m out of ammo! Good luck with it!

i have a vortec 350 engine. the fuel injectors is under the upper intake.