PCM Diagnostics & Tuning - Big cam causing SES and misfires?

Would it be possible that a big cam (FM1-RJ-111) would cause the ECm to detect misfires? What would a cam installed one tooth up or down cause? I am having misfires on all cylinders. The misfire counts go WAY down when I idle at about 1500-2000 rpms..

A big cam will always cause a misfire to be detected. You need to raise the limits at idle to make it go away.

Do you have tuning software? What tune is in it right now?

Well the deal is, the car was bought from a guy who installed the cams, heads, etc, and he said it had a tune in it.. The enginge spun a rod bearing so I swapped the shortblock out for a Force Fed forged motor w/ -2cc valve reliefs. I have a guy that can tune it, but I want to be certain I didnt install the cam wrong or screw anything else up. I have noticed that the idle is starting to smooth out a little better the more and more I run the engine. Could it be possible that the misfires will decrease as the engine gets more broken in?

A big cam will always cause a misfire to be detected. You need to raise the limits at idle to make it go away.

Do you have tuning software? What tune is in it right now?

which limits specifically?

I get a P0300(random engine misfire) with my 224. Gonna have it changed with LS1 Edit when it gets tuned on the 15th.