Just did valve adjustment - all are within spec... Getting a SOLID, 21 in Hg of vacuum at idle. Weber 38 However, truck idles fine (750RPM) at initial startup. As soon as truck reaches operating temp, idle does not go below 1000/900RPM. I am thinking that it is a choke related issue - already checked that electric choke is getting voltage - it is. Maybe manually cycling the choke? I'm very very happy with how she's running right now - and really happy with the vac. numbers. Maybe I'm just stupid!