Can't get it to idle
#1
Can't get it to idle
I switched to speed density a couple weeks ago, but have been driving on the old MAF tune because SD refuses to idle without surging or hanging. I was following a procedure on LS2 idle tuning on the HP Tuners forum, only to discover that the final idle airflow minimum table I was modifying was doing nothing. Turns out the throttle body is unresponsive to changes in either the airflow minimum table or the commanded idle in the HPT scanner bi-directional controls. When commanding the idle higher, all it does is increase RPM error which pushes the adaptive idle advance up.
I raise up the idle with the controls in both log files; only the MAF log opens the throttle more. Somehow with the SD tune, the throttle body isn't getting the memo. Why isn't the throttle responding?
I raise up the idle with the controls in both log files; only the MAF log opens the throttle more. Somehow with the SD tune, the throttle body isn't getting the memo. Why isn't the throttle responding?