i've just put on a big bore throttle body on, and now my car idles at like 1500 rpm or has a spuratic idle that goes up and down. it won't sit in one spot. has anyone else had this problem? is my ecu reading to much air or something? please help me..anyone. thanks
Josh

 

Two simple things that come to my mind:

1. Reset ECU
2. Tighten/Adjust throttle cable

 

You also might have a slight vacuum leak where the TB gasket is.

 

make sure you have set the throttle position sensor (tps) to the right specs:

0.45-0.50v at closed throttle

4.5v at open throttle

t..