Help surging idle

1987 Na fc3s I’ve been building my fc for about 3 years now and i’ve just recently gotten it started it has a really rough idle and keeps dying when I let off the gas

What’s been done to it: streetport (courtesy of banzai racing), emissions delete, was an auto but now a manual, also ac and power steering delete.

it should be idling at like 1200 rpm but is surging from 500 to 1500

Almost sounds like the fuel lines have air in

here’s a vid of it: https://youtube.com/shorts/J7vqbiQE_Zk?feature=share

1987 Na fc3s I’ve been building my fc for about 3 years now and i’ve just recently gotten it started it has a really rough idle and keeps dying when I let off the gas

What’s been done to it: streetport (courtesy of banzai racing), emissions delete, was an auto but now a manual, also ac and power steering delete.

it should be idling at like 1200 rpm but is surging from 500 to 1500

Almost sounds like the fuel lines have air in

here’s a vid of it: https://youtube.com/shorts/J7vqbiQE_Zk?feature=share