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Mogal · 03-04-2009, 12:05 PM

Hello!

Is there a way to calibrate the speedo?
I believe mine is out.

I have a GPS unit, and in the van, the GPS and Speedo read the same.
But in the GEO, the GPS read 3-4kph SLOWER then the GPS...

Speedo = 80kph
GPS = 76/77kph

I bought the car second hand, has 12" tires on it. would 13" tires correct the difference?

Also, how is this affecting my MPG readings?

03-04-2009, 12:05 PM	#1 (permalink)
Mogal Metro Join Date: Feb 2009 Location: BC, Canada Posts: 30 Accent - '09 Hyundia Accent SE 90 day: 31.54 mpg (US) F-150 2.7 Eco 2017 - '17 Ford F-150 XLT 90 day: 19.53 mpg (US) Thanks: 0 Thanked 0 Times in 0 Posts	Speedo outta calibration? Hello! Is there a way to calibrate the speedo? I believe mine is out. I have a GPS unit, and in the van, the GPS and Speedo read the same. But in the GEO, the GPS read 3-4kph SLOWER then the GPS... Speedo = 80kph GPS = 76/77kph I bought the car second hand, has 12" tires on it. would 13" tires correct the difference? Also, how is this affecting my MPG readings? __________________ ------------------- Shift your Attitude