Originally Posted by
christopherlya
Every once in a while say 2 out of 5 times, specially after the car has been sitting for more than a day without running, when it starts after a 5 seconds there is a slight hiccup on the rpms and you can feel the car shake for a sec. It always recovers inmediatly and never stalls. I've log it several times and it always present 5 seconds after start and its always when the vct mode goes from disable to emission reduction (intake cam goes from 0 to 20 degrees). I figure if I set the delay a little longer to get more heat to the cylinders before the change or as you mention hydraulic lag might me non existent by the times it enables vct.