Ok, just pulled the rocker arms off and pulled the pushrods out, everything looked good, no bent pushrods and no spilled bearings.

Did a compression test on all the cylinders and every single one is between 175-180...

Oh, after I put the rockers back on I started it up to let it warm up a little before the compression test and everything sounded good, then after I was done with the test I started it back up and I'm getting some loud ticking from the problematic side...

 

Loud ticking could be a collapsed lifter, or a broken valve spring... which could also cause a poor running cylinder.

 

I am completely lost, at least the ticking went away.

I have no idea what else to do, I have done everything, well I guess I could put new valvesprings on but I really don't think that's the problem. I checked the connections on the pcm today they looked fine, swapped some coil packs around again didn't help, I guess it's down to valvesprings....

 

When you say you checked the wires, what did you do? Just look at them or resistance/continuity check? Use a meter to check the wire from the PCM to the injector.

Do you have spark at #5? If so, why are you swapping coils.
If you have spark, if the plug dry or wet?

 

Surprisingly the plug looks decent, I've swapped the plug wires around, pretty much mixed matched the wires more than once and everytime it shows up on 5.

 

You guys will love this one. After changing plugs in all the cylinders twice and three times for #5 (tr55's everytime) I decided to change the type of plug I was putting in, so I got a set of ACdelco Iridiums, swapped them in real quick and no more missing...go figure.

Is it strange that I swapped plugs that many times and it never got better or does my car just not like the tr55's?