tuning-need something explained

skinny1 · Post by **skinny1** » Wed Dec 09, 2009 9:42 pm

Let me know if this is how open/closed loop works. From what I understand, the ecu is in open loop when the car first started. It adjusts the a/f mixture based on sensor inputs. closed loop is when the car is warmed up and begins to use the o2 for the a/f mixture. This is what I need explained- If I tune in open loop, won't the ecu correct the tune after it goes back to closed loop. another question. If I am in closed loop and the ecu sees boost, will it automatically go into open loop and run off of the tune/maps. im sure this is a silly question to most of you but i would appreciate any help.

Post by **Spunkster** » Thu Dec 10, 2009 11:23 am

Part throttle should be tuned as close as possible to where it should be so that when you enable closed loop the long term trim stays as close to 0 as possible. In the closed loop settings you can set when it changes from open to closed loop based on load.

skinny1 · Post by **skinny1** » Thu Dec 10, 2009 12:28 pm

Thanks for the reply and info.