speedo issue

Post Sat Nov 21, 2015 9:09 pm

Hi, I have read the wiki... just thought I'd ask if anyone may be able to provide their experiences with this.

My speedo went from working fine, to being very erratic to only working when going over bumps. I have just re soldered the connectos on the speedo and now:

Doesn't work if I pick up speed slowly.
Works when I give it a lot of gas but as soon as I let go of the accelerator it drops straight back to zero. Then goes up quick to whatever speed I'm doing when I accelerate hard again.

If you could maybe let me know what may be causing this before I have a look at the rear diff speed sensor tomorrow.
Thank you.

Post Sat Nov 21, 2015 9:30 pm

Wire to the rear sensor - by far the most common fault.
Don't repair - replace.

Post Sat Nov 21, 2015 9:40 pm

Brianmoooore wrote:Wire to the rear sensor - by far the most common fault.
Don't repair - replace.

What Brian said, look up where the loom clips to the bodywork above the diff

Post Sat Nov 21, 2015 10:06 pm

Thank you!

Post Sat Nov 21, 2015 10:39 pm

the gears at the back of the speedo sometimes strip .google it as ive seen its a common issue

Post Sat Nov 21, 2015 10:42 pm

yeti wrote:the gears at the back of the speedo sometimes strip .google it as ive seen its a common issue

That affects the odometer, not the speedo., and seems to be a hot climate thing. I've never seen it in a UK car.

Post Sat Nov 21, 2015 11:49 pm

oh ok fair enough lol i saw it somewhere thought it would help

Post Sun Nov 22, 2015 7:19 pm

http://pages.ebay.com/link/?nav=item.vi ... 41&alt=web

Would this be the part I'll need?

Post Sun Nov 22, 2015 9:02 pm

The usual and cheapest solution is to use one of the headlamp plugs (identical to the diff. plug), complete with a length of attached wire, from a scrap E30 loom.