hotwire oddness

On the hotwire system there's this gadget which adjusts the idle speed
according to engine load. Or that's the theory. Most of the time, mine
does. Sometimes, it decides it's going to idle at 1500, or sometimes 2000
rpm.

This *appears* to be an electronics fault rather than the stepper motor
sticking. Turning the engine off and restarting it resets it to normal
behaviour. I'd've thought that a sticky stepper motor would've stayed
stuck, once stuck, so to speak. Turning off and on clears the fault almost
without fail.

any thoughts? At some point I did the various diagnostics on throttle
position sensor and so forth, and they appeared correct.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
Satisfying: Satisfy your inner child by eating ten tubes of Smarties
from the Little Book of Complete B***ocks by Alistair Beaton.

"Austin Shackles" <[email protected]> wrote in message
news:[email protected]...
>
> On the hotwire system there's this gadget which adjusts the idle speed
> according to engine load. Or that's the theory. Most of the time, mine
> does. Sometimes, it decides it's going to idle at 1500, or sometimes 2000
> rpm.
>
> This *appears* to be an electronics fault rather than the stepper motor
> sticking. Turning the engine off and restarting it resets it to normal
> behaviour. I'd've thought that a sticky stepper motor would've stayed
> stuck, once stuck, so to speak. Turning off and on clears the fault
> almost
> without fail.
>
> any thoughts? At some point I did the various diagnostics on throttle
> position sensor and so forth, and they appeared correct.
> --
Austin, try giving the stepper motor a sharp rap with the edge of a 17mm
ring spanner next time it sticks at a fast idle!!!!!! I've lost count of
the number of these I've seen sticking. Nothing apparently wrong with the
motor, as you rightly say, but replace with new and all's well! Bloody
landrovers. Hahaha.
Badger.

Austin,

I have a spare working stepper here if you want to swap it out to see if it
is the cause. If you want it, email me on [email protected] with your
snailmail addy. (remove the ohno to mail!)


--
Neil

4.4 V8 Range Rover Vogue - 'Owl'
4.6 V8 Discovery ES - 'Piglet'
2.5 V6 Freelander GS - 'Kanga'

http://www.pigletsplace.com
http://www.mud-club.com
http://www.4x4prejudice.org

On or around Fri, 14 Jan 2005 21:09:10 +0000 (UTC), "computer"
<[email protected]> enlightened us thusly:

>Austin,
>
>I have a spare working stepper here if you want to swap it out to see if it
>is the cause. If you want it, email me on [email protected] with your
>snailmail addy. (remove the ohno to mail!)

I spose I'll have to sort it one day. odd that it resets so reliably when
turned off, mind. Chances are it is the stepper motor or associated
gubbins, I bet it don't come apart either.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Nessun maggior dolore che ricordarsi del tempo felice nella miseria"
- Dante Alighieri (1265 - 1321) from Divina Commedia 'Inferno'

The message <[email protected]>
from Austin Shackles <[email protected]> contains these words:

> On or around Fri, 14 Jan 2005 21:09:10 +0000 (UTC), "computer"
> <[email protected]> enlightened us thusly:

> >Austin,
> >
> >I have a spare working stepper here if you want to swap it out to see
> >if it

> turned off, mind. Chances are it is the stepper motor or associated
> gubbins, I bet it don't come apart either.

as I recall it can only be taken apart if it is working, remove from
vehicle apply battery so that it unscrews itself then unclip halves, or
unclip halves and connect battery to unscrew itself, I forget which way
round. I can't check back as I sort of stamped my broken one into the
concrete once I realised you could only repair a working one! said a few
**@@ and also @@** s at the same time.


> --
> Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
> "Nessun maggior dolore che ricordarsi del tempo felice nella miseria"
> - Dante Alighieri (1265 - 1321) from Divina Commedia 'Inferno'