Hey everyone, we unplugged the idle control and it still does the rev and die. If you spray starting fluid it will keep running though.. We jumped the relay and it stayed running. Any Ideas?
do as mvmiller had suggested in an earlier post and check the air plenium tubes. if you checked the air plenium tubes along the valve covers and under the intake then I suggest you re-check that area again. kind of wiggle the airtubes around very gently and see what happens. use a spray bottle of clean water to do this test. you need to spray a mist of water and not a stream around the connections and the injector holders. the problem you are having is definatly a vac leak somewhere in the system. either by way of the airtubes, injector o-rings and seals, icv tube and all of the formentioned vac lines, the rubber boot under the airflow meter or possibly the 8 rubber o-rings under the intake. look up my thread on this and you will see what we are trying to tell you here. you can change out the ICV, ICR and the ECM and have no change at all if you have a vac leak. by the way. the ECM will have nothing to do with this at all. I had this same issue a few months back, go read my entire thread titled 89 560SEL check engine light on, hard start. there are many pics in that thread that will show you more or less what these air distribution tubes do and how brittle they become after years of use. I also did a search about "high Idle" and found alot of info there so you might want to do some reading in the archives for awhile. good luck.