i got a check engine light not to long ago and took it to advanced and autozone to make sure they came up with the same code which happened to be something with the EGR so, so far i've replaced the valve and the vacuum solinoid but still it has a loss of power and the same code comes up (they clear it everytime) also when it cold starts the RPMS jump from 600 to 900 hun like a vacuum leak but the hoses look fine and everythings clean in the bay ANY IDEAS PLEASE!!!!!!!!!!!!!

lmk asap thanks for your help..