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Does anyone know how to override the speed limiter an rev limiter on a 2005 Mercury Grand Marquis without spending alot of money if any at all?
 

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I had the same idea, for my 97 GM, but Ford told me it was hard wired in the chip. I do believe that there is an "add on chip" that is avaliable. The chip you want is from a police car, don't know if it will work though. Might have to grab the motor too. The chip also controls the shift points.
 

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I have a 1994 merc grand marquis gls w/ 4.6 interceptor and police pkg. any thought for engine mods and aftermarket parts. not a lot of luck online searching everything is for 99 and up
 
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