Hey,

If I was to remove my smog pump and lines would I have to flash the ECM. I don't want the check engine light to come on. This is on a 1991 350ci Z28

 

nope no issues. just cap off the exhaust manifolds and the tube to that silly cat con you probably still have. get the t\threaded pipe caps at you local home depot or the such. just don't buy pipe and threaded caps at the same time you will get some funny looks