99 Lumina, 3.8L #6 missfire

[wilcoxbryan]

I have a problem with one at work. I am hopeing someone out here will have had the same problem, but skeptic. I have a 99 Lumina (same engien and parts as 97) that is defiantaly not fireing on #6. the plug is good, the wire is good, the injector has been swaped around to see if problem followed, and the O2 sensor was checked, and I did a cylinder pressure test. All checked out great. I have even gone so far as to swap EGR valves out with another sedan. I checked around by sight and hearing and the vacume seems good. Same thing, missfire #6 while watching with the scan tool. Does anyone have a solution? I am Air Force and running out of time. The cops have put about 300,000 miles on this thing. Any advise that is within scope would be greatly appreciated.

[Carwhiz]

whoa, before you dig into egr, is cylinder 6 getting spark? check coil pack/module.

[wilcoxbryan]

YEP, getting all the spark in the world, also, the compression is good as well

[wilcoxbryan]

one more thing, the reason I replaced EGR vale with another engine was while useing the scan tool we have (genisus) is that the only test I ran that failed other than the missfire was the EGR test? Replaced EGR and still failed on idle and deceleration