high idle....5ktq ... a little help please

[Beatty, Robert]

Problem is car is running high idle after warming up, push the clutch in
while slowing down from 40-50 mph and the rpms stay at 2500-3000.  Tap the
throttle and they slowly drop down to a slightly more nomal 1200 or so.  If
i keep playing with it I can get it to drop to 900 or so.  I browsed the
archives and saw either a leak in the vacuum hoses or a dirty/malfunctioning
Idle Stablelitzation Valve.  I'll look for the vacuum leaks tonight, but I
think its going to be the valve.  I'm going to try cleaning it with carb
cleaner while actuating the solinoid.

Question is.... any other possibilities here?  Or are these 2 the most
common reasons?

Thanks

Rob
86 5ktq