Workin on the 98 Silverado AGAIN. I have a cylinder 5 missfire that keeps coming up. I had cylinder #5 missfire with the old stuff, so I decided to put new Napa Cap and rotor on, Napa wires, and some regular autolite non platinum plugs in it

....and it keeps coming up. So I switch the plug and it still comes up, I switch the wire...and it still comes up. I pulled the plugwire off while running and it has spark to it. The engine didnt change RPM though that I could tell.

I know there was a problem with the Vortec injectors but does it have its own code or is it just cylinder missfire?

I keep getting a missfire. Nothing coming out of the exhaust that I can tell.

Any help would be MUCH appreciated.