Tuning idle
Ok.. Disregard my reply.. LOL
-------------------------------------------
The Stock ECU runs in closed loop, so the idle does eventually learn and run better.. However when the car is cold and you first start it, its open loop, and thats usually where it makes more of a difference.. The 0% column in the low RPM ranges will help that, you can adjust the fuel and timing and it should help your idle a bit..
I'm not sure about idle speed though.. I think you can adjust the idle air control solenoid slightly (under the hood) to help that. I posted a suggestion awhile back to turboXS that they should add control of the idle air control solenoid for that purpose, not sure if that will be implemented in any upcoming firmware though.
Once the engine is in closed loop idle, the car will attempt to maintain 14.7:1 AFR's and the ECU does adjust.. adjustable cam gears will have the best effect on your idle quality (to smooth it out)
the lopey idle is mostly due to the cam overlap though..
-------------------------------------------
The Stock ECU runs in closed loop, so the idle does eventually learn and run better.. However when the car is cold and you first start it, its open loop, and thats usually where it makes more of a difference.. The 0% column in the low RPM ranges will help that, you can adjust the fuel and timing and it should help your idle a bit..
I'm not sure about idle speed though.. I think you can adjust the idle air control solenoid slightly (under the hood) to help that. I posted a suggestion awhile back to turboXS that they should add control of the idle air control solenoid for that purpose, not sure if that will be implemented in any upcoming firmware though.
Once the engine is in closed loop idle, the car will attempt to maintain 14.7:1 AFR's and the ECU does adjust.. adjustable cam gears will have the best effect on your idle quality (to smooth it out)
the lopey idle is mostly due to the cam overlap though..
Last edited by MalibuJack; Aug 16, 2004 at 07:20 PM.
Thanks for the reply anyways Jack. Im trying to read the manual as much as I can before I receive the UTEC and I just got a little confused about anything below 25% throttle will be the 0% column. I think I got it now though. To add fuel at idle I would use around the 800rpm / 0%. Would that be correct?




