I have them as well, and lately I am noticing that I am not getting very much spark in cyclinder 1. I the wire over to the originall and my cyclinder 1 seems to be doing fine again no CEL at all. But when I swapped back thinking maybe it was a fkuke it cam back. So I am currently running on 5 Magnecores and 1 motorcraft. I already have 1 in the mail to replace it. Hopefully this will do the trick.

95 SES Sold 99 SE Sport Sold 99 SVT T-Red Tan Interior. K&N, Magnecors, 19' Theorys, And some audio stuff.