How important is it to jet my trailblazer for winter? Stock main jet is a 130 and for 0 degrees to 40 degrees it says to use a 140. It probaly wont see 0-20 but will definatlely see 20-40 degees. Thanks...also any other jeting secrets to make it run real good come spring and summer??[img]i/expressions/face-icon-small-happy.gif[/img]

 

Also do I need to rejet the Pred90?? For cold temps that is!