Hello-

Been having a problem with my GLHS (bone stock) misfiring around 2200rpm. Idles fine, and runs fine once I get it up around 2800rpm or so.

I have no fault codes.

I know there are idiosyncrasies with the GLHS like flaky grounds and leaky 2-piece intake gasket. The car has about 94K on it and has not had any major engine work and no aftermarket mods except for a K/N drop-in.

Any else had this issue and what was found? Needing a direction to go in to troubleshoot it and not just throw money at the problem. Thanks!