Hi All,

i was testing/playing around with changing the the closed loop fuel maps. my car normally idles at 14:1 and i wanted to see if i can get it to 15.2:1.

so i changed all the cells at idle in the 3 closed loop maps to 15:2. logged idle and nothing changed, still at 14:1.

so i changed both high and low fuel maps for idle to be 15.2:1. logged my idle and still 14:1.

so i changed all the idle area of all maps to 16.2:1 and after logging my WB still reads at 14:1.

so my question is this, are there any fuel maps for idle?

i didnt want to drive the car to test out closed loop driving without knowing how changing the closed loop tables afects things.

any help/advice appreciated!!!

cheers

 

anyone got any advice or suggestions on my issue?

i have read as many Closed loop threads as i can and none of them outline a way to tune closed loop other than to have the WB simulate NB which i dont want to do.

still looking for any help please

cheers

 

In closed loop the AFR's will always strive for 14.7:1 The only way to change it is to force open loop, or tell the ecu to use a different voltage to target on the o2 sensor that equates to a leaner AFR. Some aftermarket widebands have a simulated narrow band that can be used in place of the factory narrow band o2, with programable voltage outputs to adjust the Idle and cruise AFR's. Hope this helps!

 

how can i tell the ECU to use a different voltage? is there a specific table?

I am running 88580014.

cheers

 

I'm not sure that the table has been found yet. The external wideband's have an adjustable narrowband voltage to target different AFR's.

 

it is a set value and can not be adjusted... your only options are to run in open loop, utilize the Innovate or Zeitronix widebands with programmable narrowband outputs...

 

Well, there you go.

 

thanks guys apprecaite the info/help

cheers

 

To change your idle AFR, you need to change/lower the "Open Loop Load" tables and the "Open Loop Throttle" tables in the idle RPM range, then the changes to the idle area of your fuel map will take affect.

 

if i was to go down the path of simulating narrowband with the LC1, would it be worthwhile to move the sensor to where the front O2 is and remove the front O2 altogether?

cheers

 

You can and for cl control its best too.. but hard on the sensor being ao close to the heat

 

thanks for replying mate appreciate it!!!!

Innovate sell a couple parts that i could use to assist in preventing over heat like

Heat Sink
http://www.innovatemotorsports.com/x...cat=250&page=2

Longer Bung
http://www.innovatemotorsports.com/x...cat=250&page=1

cheers