Cadillac Seville / Cadillac Eldorado Forum Discussion, Eldorado fluctuating idle on drive in Past Cadillac Vehicle Discussion; Hi, I have a 99 Eldorado with 100,xxx miles had the headgasket repair done by Midwest Cadillac at 98,xxx miles.
To clean the iac there are two bolts (Philips head) to clean the throttle body just un clamp the air intake after the maf.when cleaning the iac just clean the end/plunger and the bore where the iac goes.submariner has pics in his album with the location of iac .
Yeah I would clean the tb and iac first then go from there.yeah there is a tutorial in tech tips for cleaning both , you don't even have to do a lot of scrolling.type in on the search bar in this site and it might Pop up faster.
Update: I cleaned the throttle and iac. Put some techron fuel system by chevron cleaner and filled up the tank. Ran like a dream all week. I filled up Friday afternoon and again the symptoms started all over again. So I decided what the hell I'm going to drop another bottle of techron in the tank. And symptoms stopped again.
Any idea what it could be? I always pump 93 octane and the car is religiously maintained.