i drive a 94 integra with a ls/vtec conversion and much more. i rebuilt it a couple of months ago but ever since a have a rough idle and a lot of black smoke comes out when vtec is on. also one cylinder is runing cooler than the rest like its not firing right maybe. i took it to the dyno and im loseing like 18hp. could the valve lash be set to wide? any suggestions or replies is appreciated.