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Speedo Question

Old Apr 19, 2014 | 04:21 PM
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I have 3:73 gears in my car and the shop used HP Tuners to calibrate. I noticed today that when I set the cruise control, the speed on the DIC doesn't match the speed on the gauge.

Any clues how to fix?
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Old Apr 19, 2014 | 09:59 PM
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Not sure if there is an easy fix.
On both our 2006 and now our 2009, about 95% of the time the DIC Cruise Control speed would show 1 mph higher than the HUD speed. The analog needle agreed with the DIC.
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Old Apr 20, 2014 | 07:18 AM
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Originally Posted by Gearhead Jim
Not sure if there is an easy fix.
On both our 2006 and now our 2009, about 95% of the time the DIC Cruise Control speed would show 1 mph higher than the HUD speed. The analog needle agreed with the DIC.
Thanks! Mine error is around 5MPH at 65.
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Old Apr 20, 2014 | 08:19 AM
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Same here. I put in 3:90s and my HUD/DIC match, but is about 5 MPH off my cell phone speedo app. I tried adjusting with my Predator - it just got worse.
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Old Apr 20, 2014 | 08:19 AM
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Originally Posted by timd38
I have 3:73 gears in my car and the shop used HP Tuners to calibrate. I noticed today that when I set the cruise control, the speed on the DIC doesn't match the speed on the gauge.

Any clues how to fix?
Not very helpful info other than they don't match. Telling us what the difference is would be helpful.
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Old Apr 22, 2014 | 09:18 PM
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Originally Posted by dadaroo
Not very helpful info other than they don't match. Telling us what the difference is would be helpful.
At 65 it is off by 5mph.
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Old Apr 22, 2014 | 09:43 PM
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I never asked my tuner how to correct i figure if my speedo is right who cares what the DIC says on cruise, maybe someone on hp tuners forum can help
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Old Apr 23, 2014 | 08:02 AM
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Originally Posted by timd38
At 65 it is off by 5mph.
Do you have HUD? If so what does it read in comparison to the other two.
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Old Apr 23, 2014 | 12:33 PM
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Try posing the question to USSpeedo.com.
They can maybe tell you if it can be calibrated or fixed.
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