Whats up guys i have a ek with a b20 swap built for all motor that i just bought not too long ago. The problem is when i start the car i have to hold the gas or it will stall only does it for a couple minutes, but then when im driving if i stop at a redlight or something it does it ever so often. Car doesnt have a cat and no o2 sensor i believe. Any ideas what the problem might be?

 

is the throttle body equipped with a fitv?

 

Check ur compression that used to happen to my b16 an it had low com
On two cylinders

 

no fitv throttle body doesnt have a spot for one.

if it was the compression wouldnt it do it consistantly?

 

so you're saying you get no fast idle, correct? sounds like an iacv issue. maybe stuck.
either that, or the ecm is not commanding the iacv to open on cold start up. in which case the ect sensor may be faulty

do you have access to any datalogging capability? cuz that would be excellent if you did