Engine codes and car stuttering....

I recently installed a set of smog legal headers on my 97' Trans Am. At the same time I replaced my plugs, wires, and coil. I am now getting two different trouble codes. P0300: Random Multiple Cylinder Misfire, and P1380: ABS Rough Road.....And at the same time my ABS INOP light comes on. The car stutters at low rpms especially if your in gear and just let it idle down the road.... Dont know if its the breaks pulsating or an actual misfire somwhere......I checked all plugs and wires for correct order and to be sure they were seated right. Im gonna check to see if anything is arcing anywhere.... Any info. on this would be great thanks.

Hi guys, newibe here to AF but not to F-bodies.

I know that the LT1's are prone to melt wires when you put a set of headers on them. When they do that, they will set missfire codes all day long.

i did the same thing...put some emissions legal headers on...mine is a carbed 86 Z-28, but all of the symptoms are the same....rough idle, etc...if u found what it was i could use a lil help...also mine seems to be shifting a little hard as well.