okay so i just got done building an ls-vtec motor and im having an idle problem.. i got down to thinking the injectors are too big or i just need to get it tuned... but the car is running really rich. this is how i know why its running really rich... i turn the car on and it stays on for like 10 seconds then dies... so what i did was take the injector sensor off and cranked the motor and it turned on for like 3seconds.. WTF??
so what can i do to fix this?? smaller injectors or a tune? the injectors i have are 370cc..

 

Tune.

/thread

 

Buy a wideband. Get the car tuned. Problem solved!