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06-13-2009, 04:04 PM
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#1 | |
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AF Newbie
Join Date: Nov 2007
Location: detroit, Michigan
Posts: 5
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Speedometer
2004 Bonneville speedometer is off about 5 mph. What do I look for?
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06-20-2009, 08:59 AM
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#2 | |
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AF Regular
Join Date: Mar 2005
Location: Rochester, Minnesota
Posts: 119
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Re: Speedometer
Check tire size for proper size. The speedometer on the Bonneville is strickly electronic, calculated by pulses from vehicle speed sensor through ECM. ECM sends signal to instrument cluster which converts to MPH or Kilometers. If the car has had overisized tires on at one time it is possible to reconfigure the ECM for non OE tiresizes.
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