i swapped out the stock ls motor for a 97 gsr swap, car turns on and runs good, but once its warm and i begin to drive it, the idle drops low (500-200 rpms) and it even shuts off when i come to a stop/ red light.

i have changed the following items tps sensor new, and iacv was replaced..

any help would greatly be appreciated..

btw, the motor is a us b18c1, there is no CEL, and im running my stock 2000 ls ecu..

vtec solenoid, pressure switch and knock sensor are not wired in, could that be the cause for a low idle

 

ya i would wire that stuff in and get a gsr ecu or an obd1 ecu for your motor, then see what happens

 

Navy_Kyle,

as far as a vtec ecu goes, i do have a usdm p73 itr ecu obd2a w a jumper harness ready to hook up..

but as for hooking up the vtec,knock, and pressure switch i dont think i have it in me to do all that lol..

i dont drive the car much since i cant get it to stay on..

;/