Join Date: Oct 2012
Location: Elmsley, Ontario
I actually experimented with the opposite end of the bypass adjustment issue today. Since I got this car, I've found the throttle at cruise and low throttle openings to be overly touchy or sensitive. Just breathing on the pedal was all it took to start making boost. The cruise control even had a difficult time not feeling like it was surging and overcompensating for small undulations in the road. I figured it was inherent in the supercharged 2.0L engine and the fairly large (for a 2.0L) throttlebody. After reading this thread, it got me thinking about the preload tension on the actuator and how this would effect the amount of vacuum required to keep it open. It seemed like a really quick experiment to try, so this AM I backed it away on the slots, and is it ever different! I feel its much smoother to drive at low TP and transition to boost is much less abrupt... and the cruise is far more seemless. I expect my MPG will improve as well.