Running rough

I purchased a 1987 wrangler had a weber in it seems old I adjusted it so many times got tired of this so I bought an a original new carter put it up and started right up had it running for about 1/2 an hour took it out around the block ran good wheat down about 2 miles did a couple of stops and take off (normal) ad all of a sudden it started acting up it would low idle and turn off and it was like a rough idle so drive it home I am thinking something happened to the new carb so I looked arrowed for loose

Vacuum lines found nothing. Wires,cap,and rotor are fine am getting a spark from all 6 wires .

So I installed back the weber carb. Thinking that the problem would be the new carb but no it dos the Same thing could any one HELP