So I've tuned roughly around 80-90 vehicles of my local area from stock to built boosted vehicle. Seems like the larger the injector the more erratic the VE table gets below 60-70kpa. My buddies car camed 5.3, s485, fic1700cc, 06pcm is very erratic between 30-60kpa. 50kpa it gets so lean it asks for almost as much fuel as it does tipping into boost. I understand that this section of the VE with Large injectors the PCM is expecting a linear injector flow, but down low its hard to control this area and is no longer linear as stated on my ERM tuning tutorial and in this page here.
http://www.enginelabs.com/engine-tec...tion-with-fic/
Injectors we have are Fuel injector Clinic but still same situation. Now is there a way to go about smoothing this lower section of the VE out. lowest I seen the Injector pulse is 2.1. This is with all proper data emailed with the injectors being used. Does the pulse width need to be lower in this area to help smooth this out its just very strange looking at 50kpa.