Question about 1998 Cadillac Eldorado

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Speed limiter I'll be driving through Montana, where there is NO daytime speed limit, next year and I would like see what it will do. Don't worry the car is rock solid, has been well maintained and is in excellent mechanical condition, and has the "Z" rated tires . Right now it can't go faster than 108 mph because of the speed limiter. I'd like to know how to over ride the speed limiter. Thank You, Jim

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  • GrayCloud Aug 05, 2008

    Can you tell me which programing unit I can use to reprogram the ECU?

    I have no fear of doing it myself.

    Thank You



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It's programmed into the ECU - there's nothing you can remove from the car to delete it. You'd have to find someone who can reprogram your car's computer with the speed limiter removed.

Posted on Aug 04, 2008

  • Jeremy Dellow
    Jeremy Dellow Aug 05, 2008

    I don't know of any way you can just turn the feature off. It may exist, but I doubt it. That limiter is hard-coded into the ECU. You'd need standalone engine management (MoTec, Electromotive, or an AEM EMS system), and most of those are aimed at Euro and Japanese sports cars. I don't know of anyone tuning the Eldorado, so I doubt there's a way to do it.



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Time to buy a new car? Do the math to see what it will cost you in gas. If you're like most Americans, and drive about 20,000 miles a year, increasing your car's fuel efficiency by about 15 MPG can save you over a thousand dollars a year - not to mention countless stops at the gas station. Engines are becoming more fuel efficient every year!

Get the smallest, most fuel efficient vehicle that makes sense for your daily driving. There are more hybrids and fuel efficient engines on the market every year.


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Make sure you read your owner's manual to see what type of fuel your car requires. If your engine is designed to run on regular gas, there's absolutely no benefit to putting in premium gas.

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