car dies out of idle...

I just got a gsr put in & when i turn on the car i have to keep my foot on the gas in order for to keep it on. Once it’s warmed up it seems ok.My vtec isn’t wired & i’m still running the ls ECU.could that be the reason why? Also when the car is running,when i’m stopped the idle bounces up & down under 1000 rpms :hmm:

ck timing. There’s a lot of things that could cause bad idle, but this is the only one I can think of at the moment. Did you build the motor or just buy it and put it in?

build the motor

I’d start with the right ECU before building the motor.