I just finish put in my dsm blue top 450 fuel injectors and a apexi vafc2. I set the low throttle from 1000-8000 rpm to -40% and the high throttle 1000-8000rpm -40%. but seems it cant idle @ 1000 rpm unless the curve is set between -20% and -25%. anything less then that will idle rough and will throw code43 (fuel supply). Is this normal? I'm i running lean? what should I do? I have the rest (1500-8000rpm) all set -40%.