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2004 Ford F-250 SPEEDOMETER GOING WACKY

Tiny
REBORN
  • MEMBER
  • 2004 FORD F-250
  • V8
  • 2WD
  • AUTOMATIC
  • 13,700 MILES
My speedometer will go wacky at various times. When sitting at a red light the speedometer will bounce from 0-40, 0-50 but if it bounces to 90 or more it will stall the truck. The engine will restart with no problem. Is this all cause by the speedometer sensor.
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Thursday, October 8th, 2009 AT 8:55 AM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Maybe fault in speed sensor assembly see diagram.
Does trans shift O.K? Need scanner to checkout sensor Ford provides no tests other than scanner.
Hope this helps
Thanks for donate
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Thursday, October 8th, 2009 AT 9:13 AM
Tiny
REBORN
  • MEMBER
  • 2 POSTS
Truck shifts fine and runs fine while moving above idle speed. I have no check engine lights that have come on. I plugged a meter into the socket under the dash and no codes where given.
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Thursday, October 8th, 2009 AT 9:37 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS


https://www.2carpros.com/forum/automotive_pictures/198357_Grafic_3_53.jpg


Code reader will not do the job. Need a diagnostic scan tool. Like Snap-On, OTC, Pro-Link iQ. these will be able to read VSS input and speedo function.
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Thursday, October 8th, 2009 AT 9:48 AM

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