Speedo reads half - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 7 (permalink) Old 02-05-2010, 11:23 PM Thread Starter
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Speedo reads half

So...ah yeah, just like the title says, my speedometer and odometer are now reading half of what they should. Happened today while I was driving home... was reading fine on the highway (70 MPH). Then when I got off, I noticed that it was reading 20 MPH when I was doing 40 MPH (verified on GPS). Got back on the highway, and it's still reading half. Clocked some distance using mile markers and GPS.... odometer is also reading half. Any ideas as to what it could be?

Zach
2000/2006ish Ford F-250 Larryette 7.3 Powerstroke 4x4
5" Sewer Pipe Exhaust (video clip), DIY 6637 Intake, Wicked Wheel'd, De-foiled, Missing EBPV, Edge Juice with Attitude, X Code Springs, 33" BFGs (SUCK), Alpine W200, Pioneer "D" Series Kevlar 6x8"s, Sirius Satellite Radio, 12" Memphis Pro Audio Subwoofer.
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Just because I kiss the prettiest girls and I drive my truck too fast, why does everybody want to kick my @ss?

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post #2 of 7 (permalink) Old 02-06-2010, 12:26 AM
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The sensor on top of the diff? Does your cruise control work? My sensor went out once and that's what it did.

SOLD...early 99 F350 CC 4WD SRW, Tymar intake, 4 in. turbo back straight pipe w/ 5 in. tip, DP tuner, 203 t-stat, Timbrens in the rear, front leveled, King Ranch wheels, ISSPro gauges, Weston brush guard, rebuilt my trans using a Torqueshift converter
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post #3 of 7 (permalink) Old 02-06-2010, 05:55 AM Thread Starter
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Didn't test cruise cause after it was reading half, I was in snowy conditions with lotsa traffic.


So your sensor went out and that's what it did? How much was the part?

Zach
2000/2006ish Ford F-250 Larryette 7.3 Powerstroke 4x4
5" Sewer Pipe Exhaust (video clip), DIY 6637 Intake, Wicked Wheel'd, De-foiled, Missing EBPV, Edge Juice with Attitude, X Code Springs, 33" BFGs (SUCK), Alpine W200, Pioneer "D" Series Kevlar 6x8"s, Sirius Satellite Radio, 12" Memphis Pro Audio Subwoofer.
20x10 Mickey Thompson Classic IIs, waiting on tires


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Just because I kiss the prettiest girls and I drive my truck too fast, why does everybody want to kick my @ss?

Donut Video
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post #4 of 7 (permalink) Old 02-06-2010, 11:12 AM
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under 30 bucks and about 5 min. to change

SOLD...early 99 F350 CC 4WD SRW, Tymar intake, 4 in. turbo back straight pipe w/ 5 in. tip, DP tuner, 203 t-stat, Timbrens in the rear, front leveled, King Ranch wheels, ISSPro gauges, Weston brush guard, rebuilt my trans using a Torqueshift converter
08 CC LB DRW MT 4WD Ranch Hand bumpers...stock for now
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Zaairman (02-06-2010)
post #5 of 7 (permalink) Old 02-06-2010, 03:19 PM
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I would say its the vss too .

Dusty



2000 ext cab XLT lariat F-350, 4in turbo back exaust, 5in stainless mbrp tip ,triple pod piller filled with isspro boost, trans temp and pyro gauges, sonnax/tricumulator, ccv mod, ebpv delete, air heater delete, foil delete, zoo dad mod, afe stage 1 intake , WW, 2in front leveling kit, Ported turbo shourd, DP tuner with 40,80,120 tunes, 16.5 x 10 in MT wrapped with BFG's

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post #6 of 7 (permalink) Old 02-07-2010, 11:55 PM
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id say vss also, get a OEM one Ive seen aftermarket ones not work too well

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post #7 of 7 (permalink) Old 02-08-2010, 12:19 AM Thread Starter
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I cleaned the VSS off yesterday and that did the trick.

Zach
2000/2006ish Ford F-250 Larryette 7.3 Powerstroke 4x4
5" Sewer Pipe Exhaust (video clip), DIY 6637 Intake, Wicked Wheel'd, De-foiled, Missing EBPV, Edge Juice with Attitude, X Code Springs, 33" BFGs (SUCK), Alpine W200, Pioneer "D" Series Kevlar 6x8"s, Sirius Satellite Radio, 12" Memphis Pro Audio Subwoofer.
20x10 Mickey Thompson Classic IIs, waiting on tires


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Just because I kiss the prettiest girls and I drive my truck too fast, why does everybody want to kick my @ss?

Donut Video
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