Quote:
Originally Posted by davo69
right so if we have identicale cars but i le t some air presure out of my tyers and both cars say 30 miles hr you would beat me
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I could not say because you don't know how accurate the speedo is in each car.
If anyone drives a Ford Focus, Mondeo and probably others with the digital milage reading under the speedo you could try this - With the ignition key off press and hold the trip meter reset button, turn the ignition to position 2 while still pressing the trip reset, after a couple of seconds the milage reading will say gauge and all the gauges (temp fuel speed revs) will move to the max value and back. Let go of the reset. This puts the dash in test mode. Keep pressing the reset button and it will change the test. You will find one that shows speed in mph. I thing is shows spd and a number, another press shows it in kmh. Go for a drive and you will see the speedo will read different to the digital reading. My Mondeo does and so does the works Focus. Both were a couple of mph out at 60mph. When you turn of the ignition the dash resets to normal. Another useful thing it shows is battery voltage, you can see how well your battery is charging, it should be over 14 volts with the engine running and all your lights, heater fan etc on. ( Don't be surprised if it drops lower when you switch on the heated quick clear windscreen, that pulls a lot of current ).