High Ideling
#3
do as solid GSR YO said and spray some carb cleaner or brake cleaner along all of the vacuum lines and do around the throttle body gasket and intake manifold gasket and even around the little black seals in the intake manifold that the injectors sit in, i've seen those leak before. If the rpms start to raise or it starts to bog, you've sucked in some of the brake cleaner, and you've found the vacuum leak. Replace the vacuum line or gasket as necessary.