Speedometer adjustment - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 10-09-2013, 08:36 AM Thread Starter
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Speedometer adjustment

Running stock rims and tires, my Speedometer is showing 55mph, but GPS shows 58. I setup the Edge CTS to do corrected MPH with stock numbers (so basically no correction) and it reports the accurate same as the GPS. How to I fix the needle to show the correct speed?

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post #2 of 7 Old 10-09-2013, 08:42 AM
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My speedo is the same way, expect mines 3 mph fast.... I left it cause it helps me with speeding tickets. Here's a bump for you.

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post #3 of 7 Old 10-09-2013, 07:38 PM
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Quote:
Originally Posted by ynpmoose View Post
Running stock rims and tires, my Speedometer is showing 55mph, but GPS shows 58. I setup the Edge CTS to do corrected MPH with stock numbers (so basically no correction) and it reports the accurate same as the GPS. How to I fix the needle to show the correct speed?

Moose
You can use an SCT tuner to adjust tire revs per mile. Corrects speedometer and sets shift points optimally.

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post #4 of 7 Old 10-09-2013, 07:41 PM
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I thought it only corrected shift timing... Good to know!

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post #5 of 7 Old 10-11-2013, 02:32 AM
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The SCT only does shifting. You need an auto enginunity to adjust speedo issues


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post #6 of 7 Old 10-11-2013, 02:37 AM
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The SCT only does shifting. You need an auto enginunity to adjust speedo issues
That's what I thought but I've never messed with it. Thanks for clearing that up

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post #7 of 7 Old 10-11-2013, 09:28 AM Thread Starter
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So it looks like I don't have what's needed. Oh well, I know I can run a half a mark fast and be safe. I'll just have to deal with it. Thanks.

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