Originally Posted by
Matt_lq4
I use to have a tbss intake manifold on my 6.0 Lq4. I have since switched to a Fast LsxRT intake manifold and Warr 102 mm cable throttle body. Unfortunately no matter how I play with the follower, cracker or underspeed/overspeed tables, I can't get a normal return to idle after a throttle blip...it just undershoots and stalls or catches, then overshoots in rpms, then dips down even further to a stall.
0% tps at idle is 0.53 volts, iac counts are 40, idle is 900 rpm and dynamic airflow and desired idle airflow are almost the same.
Base running airflow scan was performed and it wanted 84.2 lb/h in the 176-198*F cells.
If there are any special tips that the secret society of Fast lsxrt tuners is aware of, please let me know as this has been a huge headache. Idle timing is at 27 degrees and high/low octane tables are at 31 degrees in the idle areas to give adaptive idle some swing.
Tune is attached. Thank you