1990EFHATCH

I have 1990 civic hatchback with a jdm d15b v-tec converted to obd-1 i am having idle problems when i rev it slow if i rev it slow when it gets 2 1500 rpm it idles and it sound like a launch control and i cant find the problem can anyone help

96civic_hb

1. Wrong place to post this.
2. It's hard to understand what you're saying.