Van Speedo

[AutobahnSHO]

So I'm leaving again tomorrow and can't do anything about it anyways, but figured I'd ask-   

The speedo on my 92 Voyager sometimes doesn't work.  Everything else runs fine but it either stays flatlined or you're driving along and it all of a sudden jumps up to whatever speed you're driving. If it doesn't work, turning the van off then restarting usually fixes it.

I think I read the speedo is electronic from the ECU, any ideas on how to fix this?
I dont' care how fast I'm going but if I try to sell next year the safety inspection will be teh suxx if it doesn't work 

[3.0L V6]

Assuming 4-spd automatic transmission - There's an output speed sensor on the transmission. It can be swapped without too much hassle. It sounds like it's flaking out.

Search around www.allpar.com in the forum area to get an idea of what's required

[JWC]

I think "Van Speedo" makes a good screen name, at least.

3.0 is correct about a VSS.  Usually it will also cause erratic trans shifts.

[Soup DeVille]

I think "Van Speedo" makes a good screen name, at least.

Conjures up images of a hairy German guy wearing a banana hammock and one of the WWI pointy-topped helmets.

[AutobahnSHO]

LOL

Thanks for the help guys.

I will be a little sad when I get rid of that minivan (yeah I know)- it was the 3rd and last vehicle I pwned the Autobahn with...
--It really drives like crap though compared to my newer Mini or even up-armored SUVs...

[TBR]

The Neon had some faulty soldering on the instrument cluster that caused similar issues (this common problem raised its ugly head 3 miles away from the seller's house, luckily it was a free fix), it might be worth researching that since your van is a similar era Chrysler product.

On a side note, on rare occasion my Prelude's speedo will also jump a little, it is really odd in that it almost never happens and seems to otherwise be accurate.

[S204STi]

So I'm leaving again tomorrow and can't do anything about it anyways, but figured I'd ask-   

The speedo on my 92 Voyager sometimes doesn't work.  Everything else runs fine but it either stays flatlined or you're driving along and it all of a sudden jumps up to whatever speed you're driving. If it doesn't work, turning the van off then restarting usually fixes it.

I think I read the speedo is electronic from the ECU, any ideas on how to fix this?
I dont' care how fast I'm going but if I try to sell next year the safety inspection will be teh suxx if it doesn't work 

If it's anything like GM instrument panels, the stepper motor in the cluster is bad and you'll have to replace the entire cluster pack.  Kinda pricey, too.

[AutobahnSHO]

If it's anything like GM instrument panels, the stepper motor in the cluster is bad and you'll have to replace the entire cluster pack.  Kinda pricey, too.

Ruh Roh Raggy....

It seems to me (amateur I know) that it's an intermittent signal getting to the cluster though- wouldnt a bad motor show signs of weakness? (like the window motor that needs help sometimes going back up... still haven't gotten around to that...)

This is always a "works or doesn't work", nothing in between.

[Eye of the Tiger]

My '94 Duster had a retarded speedo, but it was a 5-spd. When it didn't work, I'd just floor it and go as fast as I could, and then it would start working again at some point so I'd have to slow down. LOLZ. I think it was the speed senor in the trans, but I never bothered to fix it.