91 gtp dual overhead 3.4

[homey1]

is it possible to disconnect the digital egr and still drive the car. i sprayed
cleaner on the egr without taking it off and my high idle on startup went away for a day but it is back. i dont know it was a fluk or what. the car starts right away and idles at 3000 and slowly comes down to 1000,but it takes awhile. when it settles down it idles like a new one.reving to high on start going to blowup.gas milage sucks. please help

thank you