Recently cleaned the throttle body and changed out the spark plugs at just under 70K miles on 2007 Chevy Trailblazer with 4.2L engine. Never owned OBD2 scanner but picked one up and it indicates Throttle Position at 12.9%-13.3% at idle, is this normal for a 2007 Chevy TB 4.2L engine? I would think it would be near 0 at idle but maybe not due to the design of the throttle body, car idles fine at 650 RPM or so, seems to accelerate fine and short/long term fuel trims in spec according to my OBD2 scanner, thanks for any help.
