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Jerry Newton
Jerry Newton, Cadillac Technician
Category: Cadillac
Satisfied Customers: 4629
Experience:  ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
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CADILLAC ELDORADO: My my 1999 eldorado accelerates all of a

Customer Question

My my 1999 eldorado accelerates all of a sudden for about 10 minutes than slows down speeds up to 45 mph. Took it to the dealer a couple times but it would not do it when they had it.
Submitted: 2 years ago.
Category: Cadillac
Expert:  Jerry Newton replied 2 years ago.
Replace the IAC and its electrical connector (pigtail), and retest it. I have seen a number of very intermittent IAC failures as well as broken wires inside the insulation, right at the connector. Particularly if you cannot duplicate it for the tech, meaning that it cannot be properly diagnosed, a new IAC and connector is the most likely fix for this.