Alright so my '94 gsr has been acting up lately. When I hit vtec, it engages just fine (at 5800 rpm) and then continues on until about 7000 rpm, at which point it seems to cut out. It seems from 7k rpm to 8k that I am just dumping a bunch of excess fuel out of the exhaust but that vtec is not functioning properly. Any ideas?

BTW, I have tried to avoid revving that high lately, due to the fact that obviously something isn't right and I don't feel like having to get a rebuild. h: