Bump.
After installing the spark plugs, the engine's performance has increased greatly, and it goes into limp-mode far less often, but something is wrong with the idle. I mentioned it in the previous post, but it's really starting to worry me. When stopped and idling in gear, the RPM's seem to dance around, causing the car to want to jump forward every couple seconds if I'm not holding the brake hard enough. With the old, worn-black spark plugs, it did not have this problem. Could it be a poor choice in replacment plugs, or is there something seriously wrong?
I reset the CEL (disconnected the battery) and it's been 3 days. But the CEL has not come back on. Yet it's kicked itself into limp mode twice and idles very strangely (in gear only).
ANY ideas, please?