Rendezvous 04, the rpms stay idling high without pressing gas.

Check for applicable trouble codes. Some of the national brand auto stores will check codes for free.

You may need to clean the throttle body and clean those small passages. With a high idle block off mouth of throttle body, should have a big effect on the idle? There are several issues that could cause idle to act up. Vacuum leak--maf and or map sensor. Don't replace anything unless testing points you in that direction.

A faulty egr would not create a high idle issue. if an egr valve were to open while idling then it would create a heavy stumbling engine or it would die right out. if there is a check engine light on (or service engine soon light) have the codes pulled. Failing that then I suggest taking it to a reputable shop

Test your fuel pressure for leak down while sitting.. It should hold 52-59 psi... If not it could be a weak fuel pump..Also test the fuel pressure regulator to see if its leaking gas into the vacuum lines.. Alot of times you can do this by running the vehicle then leaving it set for 45 min and then removing the vacuum line at the fuel regulator and checking for wetness... If its wet with fuel its leaking and needs replaced..

you may need to clean the throltte body, and then start the engine and hold the rpms high for a minute, then slowly reduce the gas pedal to idle, you blanked out the memory, now it needs to learn the idle speed again.

start looking for a vacuum leak, most common problem for high reving

YOU HAVE ENGINE VACUUM LEAK.AROUND THROTTLE BODY AREA COULD BE THROTTLE BODY GASKET OR ITS LOOSE.THE IDLE AIR INLET PASSAGE OR THROTTLE BORE IS DIRTY FULL OF CARBON BUILT UP.YOUR IDLE SPEED CONTROL COULD BE FAULTY.

I had the exact same problem on my 04 GC. I put some Techron Concentrate Plus Fuel System Cleaner in from Wal-Mart and it seemed to fix the problems right away. Let me know.

sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...

then u need togo sumwhere else