My friend has an Ls/Vtec but he is having problems. I'm posting this for him, if you need any more details let me know & I'll ask him. Thanks.

" while driving my car , the RPM needle bounce's spiratically, the
car also feels like its cutting out for a quick second. My car also turned
off on me while @ an intersection so I'm not sure if it has something to do
w/ spark or what? I just changed the spark plugs so those are new ...please
help and let me know if anyone has encountered this problem."