hey guys,

ill be brief and to the point,

-big port 4age
-idles at 1600rpm when hot
-65mm throttle body
-no cold start or idle advance
-0 vacuum hoses connected to the throttle body
-tps set correctly
-idle screw all the way down to lowest point

now ive given the jist of how my engine is set up, i beleive ive done what i can to make it as low as possible but theres one thing id like to know, whats this so called sandwhich plate that can be made up to block of some vacuum holes or somthing? I'm vague on this information if anyone can fill me in id be greatful

yes i have done a search and couldnt find the info i needed

cheers,

stefan