Speedo immediately drops to zero below 20mph
Discussion
Speedo drops to zero below around 20mph, and doesn’t pick up from zero until around 15/20mph.
Is this something anyone else encounters?
It doesn’t cause me any problem, but I have had the relatively familiar issue of stalling when slowing to a stop/junction after dipping the clutch. Very intermittent though.
Not sure if it suggests a connected issue.
I have read the posts on speedo connections, signal converter, speed sensor on the diff, stepper, etc, but thought I’d ask anyway.
Anyone offer any thoughts?
Is this something anyone else encounters?
It doesn’t cause me any problem, but I have had the relatively familiar issue of stalling when slowing to a stop/junction after dipping the clutch. Very intermittent though.
Not sure if it suggests a connected issue.
I have read the posts on speedo connections, signal converter, speed sensor on the diff, stepper, etc, but thought I’d ask anyway.
Anyone offer any thoughts?
Thanks all, I half anticipated you would all say that, and it really causes me no issue as I'm usually looking at where I'm going rather than watching the speedo at that speed!
scoobywheeler said:
Mine was like that until I had to replace the road speed sender. Works perfectly since
I'm very tempted to look at that, to see if it solves the stalling thing, though the price is a little big for an undiagnosed solution - around £135 for a simple looking little device, and I'll need to buy a feeler gauge to ensure I get that detail right (though they are pretty cheap). I bought one off of ukkid from in here a while ago after breaking mine. He may still have some, think it was £50ish, send him an emai if anyone reading this needs one rather than paying the rip off price.
ukkid35@gmail.com
Mine has always started at 10/15mph anyway and still does with a new sensor, although I didn't exactly make the gap small as I didn't want to melt the end again
ukkid35@gmail.com
Mine has always started at 10/15mph anyway and still does with a new sensor, although I didn't exactly make the gap small as I didn't want to melt the end again
s p a c e m a n said:
I bought one off of ukkid from in here a while ago after breaking mine. He may still have some, think it was £50ish, send him an emai if anyone reading this needs one rather than paying the rip off price.
ukkid35@gmail.com
Mine has always started at 10/15mph anyway and still does with a new sensor, although I didn't exactly make the gap small as I didn't want to melt the end again
I did the same a couple of months ago. I haven't fitted it yet due to access issues. (Both on the car and a frozen shoulder). Top bloke to deal with.ukkid35@gmail.com
Mine has always started at 10/15mph anyway and still does with a new sensor, although I didn't exactly make the gap small as I didn't want to melt the end again
s p a c e m a n said:
It’s odd that when you think about it, If it hasn’t moved how did it grind away so much.
As that brackets bolted to the Dif any Dif movement wouldn’t make any difference as the whole thing moves as one.
Can’t get my head round this.
Fire,,,,kin ell
PabloGee said:
Wowser!
Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
I think the width of a good old old cigarette packet was once mentioned on here decades ago. Which might be why so few work properly Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
As long as the sensors connecting bracket bolts are tight to the Dif and the sensor clears any high points on the teeth then locked off successfully it should stay put for years.
I’m sure most cars are still using the factory fitted sensor.
s p a c e m a n said:
I couldn't figure out what had happened to my old sensor, there was a gap there when I looked at it and the new one hasn't been murdered yet so there can't be any movement in any of the parts. Best I can figure is something got stuck in or on the toothed wheel, bit of gravel maybe.
Yeah that’s gotta be it. Makes sense. I’ve been in the gravel a few times tbf
Classic Chim said:
PabloGee said:
Wowser!
Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
I think the width of a good old old cigarette packet was once mentioned on here decades ago. Which might be why so few work properly Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
As long as the sensors connecting bracket bolts are tight to the Dif and the sensor clears any high points on the teeth then locked off successfully it should stay put for years.
I’m sure most cars are still using the factory fitted sensor.
Steve_D said:
Normal failure mode is the wires at the sensor get crisp over time and sitting above the exhaust and finally fracture just where they go into the back of the sensor.
Steve
Steve
Riff Raff said:
Classic Chim said:
PabloGee said:
Wowser!
Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
I think the width of a good old old cigarette packet was once mentioned on here decades ago. Which might be why so few work properly Though I saw somewhere that the target distance is 0.2mm, which seems extremely close. Have I got that right?
As long as the sensors connecting bracket bolts are tight to the Dif and the sensor clears any high points on the teeth then locked off successfully it should stay put for years.
I’m sure most cars are still using the factory fitted sensor.
Steve_D said:
Normal failure mode is the wires at the sensor get crisp over time and sitting above the exhaust and finally fracture just where they go into the back of the sensor.
Steve
Steve
and interesting Steve points out the wiring as often the issue. I accidentally crushed my connector when dropping the body back on my car though everything else went smoothly…
I might well replace the wiring too.
Good tip
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