87 GLHS misfire at 2200

[87glhs]

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!

[cordes]

How do the plugs, wires, cap and rotor look? Any carbon tracks in the plug boots?

[87glhs]

That was a good question. I pulled the cap, cleaned the contacts a bit, no carbon tracks. However the rotor looked pretty bad and I couldn't get it off the shaft so I had to carefully break it. Anyway it's replaced and did not misfire on my commute to work so that may have been it. Appreciate it.