Speedometer surging at idle - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 08-10-2013, 04:29 PM Thread Starter
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Speedometer surging at idle

Hey Guys,
Got a 01 F350,Auto,CC,4x4,LWB with 210k miles. My speedometer is jumping when I am sitting at idle.Furthermore,the door chime comes on when I put the emergency brake on and the truck is in park the whole time. Do y'all have any idea of what is causing this?? Thanks
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post #2 of 7 Old 08-23-2013, 11:49 PM
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My truck chimes if I accidentally don't take the parking brake all the way off and begin to drive away, meaning the pcm or lcm is receiving input from the speed sensor. Sounds like your speed sensor is shorted and giving input all the time, tricking your speedometer, and p-brake function.

2002 F-250 LARIAT CCSB 7.3 AUTO 4X4 261,XXX
2004 EXPLORER XLT 4.0 AUTO 2WD 130,XXX
1966 MUSTANG COUPE 289 4 brl V8

IN-LAWS...
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2004 F-250 RCLB 6.0 AUTO 4X2 38X,XXX
2005 F-250 RCLB 6.0 AUTO 4x2 36X,XXX

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post #3 of 7 Old 08-24-2013, 05:47 AM Thread Starter
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Thanks so much. Where is the speed sensor located and where would be the best place to purchase a new one?
Btw: War Eagle!
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post #4 of 7 Old 08-24-2013, 09:22 AM
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WWAAAARRR EAGLE !!! I think speed sensor is at junction of tailshaft and transfer case, seen from front just above and to left of front driveshaft on my truck. Local auto parts place would likely have one to compare, but you may have to unplug it to recognize it.

2002 F-250 LARIAT CCSB 7.3 AUTO 4X4 261,XXX
2004 EXPLORER XLT 4.0 AUTO 2WD 130,XXX
1966 MUSTANG COUPE 289 4 brl V8

IN-LAWS...
2004 EXPLORER SPORT TRAC 4.0 4X2 100,XXX
2004 F-250 RCLB 6.0 AUTO 4X2 38X,XXX
2005 F-250 RCLB 6.0 AUTO 4x2 36X,XXX

SOLD... 3 RANGERS, 3 F-150s, 3 F-250s, 96 COUGAR 4.6, 99 EXPEDITION 5.4, 65 66 AND 69 MUSTANGS

RE-ASSIGNED... MULTIPLE FORD POLICE INTERCEPTORS


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post #5 of 7 Old 08-24-2013, 09:29 AM
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Maybe here?
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2002 F-250 LARIAT CCSB 7.3 AUTO 4X4 261,XXX
2004 EXPLORER XLT 4.0 AUTO 2WD 130,XXX
1966 MUSTANG COUPE 289 4 brl V8

IN-LAWS...
2004 EXPLORER SPORT TRAC 4.0 4X2 100,XXX
2004 F-250 RCLB 6.0 AUTO 4X2 38X,XXX
2005 F-250 RCLB 6.0 AUTO 4x2 36X,XXX

SOLD... 3 RANGERS, 3 F-150s, 3 F-250s, 96 COUGAR 4.6, 99 EXPEDITION 5.4, 65 66 AND 69 MUSTANGS

RE-ASSIGNED... MULTIPLE FORD POLICE INTERCEPTORS


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post #6 of 7 Old 08-24-2013, 09:32 AM
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Could be small two-wire plug visible from rear, behind the upper transfer case. That's more likely. Unplug that and see what happens!

2002 F-250 LARIAT CCSB 7.3 AUTO 4X4 261,XXX
2004 EXPLORER XLT 4.0 AUTO 2WD 130,XXX
1966 MUSTANG COUPE 289 4 brl V8

IN-LAWS...
2004 EXPLORER SPORT TRAC 4.0 4X2 100,XXX
2004 F-250 RCLB 6.0 AUTO 4X2 38X,XXX
2005 F-250 RCLB 6.0 AUTO 4x2 36X,XXX

SOLD... 3 RANGERS, 3 F-150s, 3 F-250s, 96 COUGAR 4.6, 99 EXPEDITION 5.4, 65 66 AND 69 MUSTANGS

RE-ASSIGNED... MULTIPLE FORD POLICE INTERCEPTORS


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post #7 of 7 Old 08-24-2013, 11:26 AM Thread Starter
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Thanks for the info. Well see what she does.
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