Sorry about that but thanks for the greeting
It's a 4.3l vin W, I tried switching plugs and did not follow but could not switch wires cause it's a straight boot and all the others are 90 degree boots. But I put a plug in it and grounded it to see good spark. After running for a few minutes found the plug was slightly wet. Compression is good at 180. How do i check the injector pulse? I though the injectors were under buried under the upper intake. No vacuum lecks that i can find. If it was avacuum leak wouldn't it be a random misfire instead of always on #6?