Speedo sticking

[davew993]

Help required please...

My speedo needle has started to stick on the bottom and then starts working at about 20mph. i have also notice the mileage is not going up, not a bad thing []

Has anyone else had this issue? Does the speedo work of a cable ? Any advice is appreciated.

 

[oxford_hippo]

Thinks it's the internal plastic gears which wear out, and about £150ish to get it repaired.

Depending on how 'retentive' your service history is I think when it is repaired the speedo could be set to what-ever mileage - so you can make up for lost miles which haven't been added now whilst its not working - sure someone more technically minded can give you some more info.

Alternatively perhaps this is an ideal excuse for a quick tour down to the south of france?

Hope that helps.
T[&:]

 

[matthewb]

Correct, I think, Tim. Actually they don't so much wear-out as fall-apart. It's the lubricant, apparently.

I followed the instructions on http://www.odometergears.com/products/Porsche/911-993+94-98+%28Non-US%29/73 and discovered my 15-tooth cog wheel was now only a 13-tooth cog wheel.

They are very helpful and I have ordered a replacement from them - $25. They insist on using FedEx - $40.

FedEx were supposed to deliver yesterday but as so often with this company they messed it up. They now have 1 hour and 5 minutes to meet their 'customer retention' promise to me.

No idea why the speedo might be sticking - suggest you talk to them, David. It is an electrical device - not cable - at least on my Porker.


M

 

[Mark Elder]

Dave, I wonder if this is the cogs as the needle is also sticking. I thought the cogs on the odo did not impact the needle.

You might find it is just an electrical problem because, years ago, I had my audio system replaced by a local company and when I picked up the car the speedo (needle and miles) were completely dead. The electric cable sends pulses from the sensor (on the abs I think) to the speedo on the dash so the audio company had damaged that cable and had to replace it.

Maybe you have an intermittent connection on that cable.

 

[matthewb]

Sorry for not making myself clear, Mark. I was indeed referring to the broken cog problem with the odometer.

I have no idea why Dave's speedo might be sticking. I think your intermittent connection idea is worth following-up.

Dave - just remove the speedo, pull the plug out, wiggle the cable a bit, put the plug back in (perhaps use some contact cleaner) and replace the speedo.

M