2004 Ford F-250 SPEEDOMETER GOING WACKY

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.

Thursday, October 8th, 2009 AT 8:55 AM

3 Replies

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

Was this

answer

helpful?

Yes

No

Thursday, October 8th, 2009 AT 9:13 AM

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.

Was this

answer

helpful?

Yes

No

Thursday, October 8th, 2009 AT 9:37 AM

DOCFIXIT

MECHANIC
18,828 POSTS

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.

Was this

answer

helpful?

Yes

No

Thursday, October 8th, 2009 AT 9:48 AM