Definition:This function is used to adjust the Scalar Throttle Body Air.
Platform:
Min Value:
Max Value:
Description:
The factory uses .75 air for 672 rpm, thus by subtracting the TB Air Flow you get .2 air at 672 rpm.
See "ISC Dashpot Control" for further detail. ISC_DASHPOT_PRE-POSITION &
the DESIRED_AIRFLOW_NEUTRAL/DRIVE air flow #'s are asigned to a look-up table that applies
a duty cycle to the ISC, there is no feed back as far as RPM or air flow.
Hints:
If the "ISC Neutral Idle Air Flow" is not set correctly the RPM error exceeds
175. you can zeroing out the "ISC Neutral Idle Air Flow" function and watch the
idle. It was about 200 RPM's below desired. This explained the timing adder.
idle should be set by monitoring the timing if any after market air componets
have been installed. You should adjust the Idle set screw in (higher RPM) until
they achieve a time of around 12 degrees, but they are not to exceed 750 on the
idle. the EEC was designed to control the idle with the ISC and that the timing
is supposed to be used as a secondary idle control. Ford states this is a common
problem with larger TB and air meters.