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Speedometer pulsates

Old Oct 13, 2002 | 05:48 PM
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Default Speedometer pulsates

Above 45mph, the speedometer on my 99 formula pulsates 5-7 mph slower then I'm driving (ex....while driving 70, the speedo needle bounces from 70 to 63,64,65 then back to 70). I do a lot of freeway driving using cruise control and this abnormality causes accel/decel surging. It seems to happen after the car has reached operating temp and has been driven ~10minutes or so.

I did a search and came up with a possible bad VSS connection. Also, the gauge cluster was replaced at 20k miles ago for the "trip meter resetting TSB"

Any other ideas?

TIA

Larry

<small>[ October 13, 2002, 05:59 PM: Message edited by: 2manyFbods ]</small>
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Old Oct 13, 2002 | 07:38 PM
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wrencher
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Default Re: Speedometer pulsates

You need to scan your PCM & see the info that it is getting then go from there.
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Old Oct 14, 2002 | 11:04 AM
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Default Re: Speedometer pulsates

I'll scan it with Atap tonight. It doesnt seem like this has been an issue with many owners. Has anyone seen this issue before?

Larry
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Old Dec 5, 2005 | 01:55 PM
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Default

Mine did something similar. I replaced the speed sensor at the rear of the tranny and BAM! I was back in business. The speedo works perfect!
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