![]() ![]() I personally have spent over a full day tuning just the idle messing with all of the tables your listing - just never really had an "exact" science to it like this - again thank you and I will be trying this out as you've described I don't like doing the throttle brakes like how it's said to do on EFI's write-up - always seems to put the settings WAY too low - instead I set min air to what I'm seeing in the MAF g/s during a hot idle, leave proportional and integral airflow all where it's at then raise or lower the brake settings to where when I use the bi-directional controls in the scanner, I can only force the idle rpm 100 less than what I'm commanding in the tune. Then you if need be you can play with throttle settings that effect all idle airflow tables at once so the throttle will react better to changing loads and not over react to loss of loads. ![]() ![]() This is why for timing "I" try to "power tune" the idle - lower main base idle timing to something from 10 to 22 degrees - yes this will make it more lopey, put main idle timing areas in the main spark tables in the low to mid 40's "this raises the roof so to speak on the spark reserve ability" then increase the over and under speed spark corrections to where the bigger error areas peak around 22 degrees - you can leave the smaller errors low if you wish for main idle reasons. I try to tune them to where I can "with automatics" pull the shifter into drive from a neutral position with the brake applied while simultaneously hitting the bump stop on the steering with the AC on - this "best" assures most torque reserve possible with idle. If you raise it too much and adversely lower idle air too much, it will make things like heavy loads kicking in kill the motor - I've seen something as simple as hitting the bump stops on the steering kill an engine with too high of idle timing. I typically will lower or leave idle spark the same as factory. You don't want to do that.Don't want to sidetrack this which is why I haven't posted anything about this - really liking this thread by the way - thank you for all your hard work on this - but you might want to hear Dave out. ![]()
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