Manual transmission should be around 750 rpm. Automatic should be around 850 rpm at idle, warm engine on both. The RE is fuel injected so if the idle is out of wack I would suggest pulling codes on it to check to see if a sensor is going out or is problematic. The next item would be to check to make certain that your timing is correct (had a timing chain issue??). That can have an odd impact on idle if it is out several degrees. You may need to check the thermostat also if it idles high but does not come down when it has warmed up. The thermostat may be stuck slightly open and the temp sensor may read "not up to temp" and kick the idle up as it thinks it is still in warm up. The last thing to have checked are the temp sensor(s) themselves (there may be more than one). The temp sensor may not read correctly or respond with the correct voltage back to the computer...they do fail occasionally and the engine is 15 years old. May want to check those areas over first as I always hesitated messing with a fuel injected engine's idle until I have ruled out the other possibilities first. Other areas to check...TPS (throttle position sensor) and timing chain for any "stretching" issues that may have lead to the timing being off.
Hope that helps.
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