[MJWO3901]

I've had all sorts of issues with my 2010 Camaro, one of those issues are somewhat random misfires. Cylinders 1 and 2 frequently misfire as well as 5 however less often.

These misfires occur MOST during low RPM and especially when the engine is under stress. Engine has around 120k miles on it.

I've done the following so far:
- searched and found no intake leaks
- cleaned MAF, replaced MAF
- quite a few replacement spark plugs
- replaced 2 ignition coils on 1&2
- manually scrubbed carbon off intake valves (no catch can till ~100k miles)
- dumped countless cans of seafoam in gas tank

Not really sure what else to do. I have considered taking cylinder 1 & 2 injectors out and inspecting, however I've never done this before and don't have any torque specs or anything when I put things back together.

Could anyone offer any suggestions? Or offer some insight into the injector removal/inspection/reinstall process?

Thank you very much!