blake,
Just called local independent lexus shop - they are very good - this is what they say:
All 95-97 LS owners have a similar complaint. The shop feels like it is due to the "higher idle" rpms that Lexus incorporated into the 98-97 design. On cold engine startup, rpms can go around 1800-2000! In about a minute or so, engine should "kick down" to around 12-1300 rpms, ANOTHER minute + and another kick down to 700-900 rpms.
They know of your problem/complaint from many other customers who own 95-97 model year LS.
Since you've said that the problem goes away after warming up (low 700 idle) - this seems to hit the nail on the head!!!
90-94's had lower ( 1300 rpms on startup) as does my Gen III ( 98-00) which has about 1200 rpms on startup. May I say it - sounds like a DESIGN FLAW for the Gen II LS's -
But not to worry, they say no damage can result - just annoying!!!
Anyway, check out the startup idling and time it out - see what happens to your car. Then wait at least until car is in 1200 rpm range for one test, and wait till it kicks all the way down to 800 or so for another. Let us know !
Good news is that you've got the right car for such a warm climate you're in!! should get to operating temp pretty quick!!