95 Disco V8i XS Ignition Problems

S

Steve C

Guest

• Feb 7, 2005

• #1

Can anyone help with ideas... for the second time after being 'fixed'
by the garage, my disco continues to fail.... symptoms are engine
hunts between up and down to about 1500 rpm, gradually gets slower and
slower then dies. If I put it in gear, its an auto, it dies almost
immediately! Apparently the coil, amplifier module and rotor arm have
been replaced, but I feel they are inferior parts. Have decided to fix
the problem myself .... then I will know exactly what parts have been
changed and with what.

Any pointers to get me going would be greatly appreciated!

 

B

Badger

Guest

• Feb 7, 2005

• #2

"Steve C" <[email protected]> wrote in message
news:[email protected]...
> Can anyone help with ideas... for the second time after being 'fixed'
> by the garage, my disco continues to fail.... symptoms are engine
> hunts between up and down to about 1500 rpm, gradually gets slower and
> slower then dies. If I put it in gear, its an auto, it dies almost
> immediately! Apparently the coil, amplifier module and rotor arm have
> been replaced, but I feel they are inferior parts. Have decided to fix
> the problem myself .... then I will know exactly what parts have been
> changed and with what.
>
> Any pointers to get me going would be greatly appreciated!

I had the exact same fault on my 110 many years ago, 3.5 V8 fitted with the
35DLM8 dizzy, it was the dizzy amplifier module on the side. I replaced the
module with an allegedly new one and it ran ok cold but when it got hot it
misfired at 2500rpm + or - 200rpm, but ok either side - weird!! Replaced
module again and it has been fine ever since. That dizzy is still on my 110,
but now on a 4.0 engine.
Badger.

 

A

Austin Shackles

Guest

• Feb 7, 2005

• #3

On or around Mon, 7 Feb 2005 13:01:59 +0000 (UTC), "Badger"
<[email protected]> enlightened us thusly:

>>
>> Any pointers to get me going would be greatly appreciated!
>
>I had the exact same fault on my 110 many years ago, 3.5 V8 fitted with the
>35DLM8 dizzy, it was the dizzy amplifier module on the side. I replaced the
>module with an allegedly new one and it ran ok cold but when it got hot it
>misfired at 2500rpm + or - 200rpm, but ok either side - weird!! Replaced
>module again and it has been fine ever since. That dizzy is still on my 110,
>but now on a 4.0 engine.

I'd check the fuel side out - There's always that pesky idle speed thing...

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"Quos deus vult perdere, prius dementat" Euripedes, quoted in
Boswell's "Johnson".

 

T

Tim Hobbs

Guest

• Feb 7, 2005

• #4

On 7 Feb 2005 04:11:53 -0800, [email protected] (Steve C) wrote:

>Can anyone help with ideas... for the second time after being 'fixed'
>by the garage, my disco continues to fail.... symptoms are engine
>hunts between up and down to about 1500 rpm, gradually gets slower and
>slower then dies. If I put it in gear, its an auto, it dies almost
>immediately! Apparently the coil, amplifier module and rotor arm have
>been replaced, but I feel they are inferior parts. Have decided to fix
>the problem myself .... then I will know exactly what parts have been
>changed and with what.
>
>Any pointers to get me going would be greatly appreciated!

I'd echo what Badger has said. Warren cursed at my Disco for several
hours before fitting a third ignition amp - the one off mine and his
'known good one' both tested fine on his tester, but only the third
bugger actually stopped it hunting and losing power.

I've also had a visibly perfect rotor arm cause problems. They are
cheap enough to replace regardless.

Don't pay stupid LR money for ignition amps - they want £100+ plus
vat. Factors will do them for about 20 odd quid.

I think your amp will be behind the coil, not on the dizzy.

Also check the stepper motor (on the plenum chamber). Worth cleaning
out, as they can cause problems. The garage should have been able to
test this however, but well worth looking at.
--

Tim Hobbs

'58 Series 2 88" aka "Stig"
'77 101FC Ambulance aka "Burrt"
'03 Volvo V70

My Landies? http://www.seriesii.co.uk
Barcoding? http://www.bartec-systems.com
Tony Luckwill web archive at http://www.luckwill.com

 

A

Austin Shackles

Guest

• Feb 7, 2005

• #5

On or around Mon, 07 Feb 2005 16:07:07 +0000, Tim Hobbs
<[email protected]> enlightened us thusly:

>I've also had a visibly perfect rotor arm cause problems. They are
>cheap enough to replace regardless.

I've had a visibly-good rotor arm kill the thing stone dead, by shorting
through to the post in the middle, buggrit.

--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"I am tired and sick of war. Its glory is all moonshine... War is hell"
Gen. Sherman (1820-1891) Attr. words in Address at Michigan Military
Academy, 19 June 1879.

 

C

[email protected]

Guest

• Feb 7, 2005

• #6

Thanks all, I'm learning lots..... I didn't realize how much I didn't
know !

 

R

Richard Brookman

Guest

• Feb 7, 2005

• #7

So Tim Hobbs was, like

>
> I've also had a visibly perfect rotor arm cause problems. They are
> cheap enough to replace regardless.
>

Just did a full service on the series, and a brand new rotor arm
disintegrated on the first turn of the starter. Took me ages to find why
she wouldn't start, because I had just replaced the rotor arm with a brand
new one, so I looked everywhere but inside the dizzy for the problem.

--

Rich

Pas d'elle yeux Rhone que nous

 

S

Si K

Guest

• Feb 7, 2005

• #8

"Tim Hobbs" <[email protected]> wrote in message
news:[email protected]...
> On 7 Feb 2005 04:11:53 -0800, [email protected] (Steve C) wrote:
>
>>Can anyone help with ideas... for the second time after being 'fixed'
>>by the garage, my disco continues to fail.... symptoms are engine
>>hunts between up and down to about 1500 rpm, gradually gets slower and
>>slower then dies. If I put it in gear, its an auto, it dies almost
>>immediately! Apparently the coil, amplifier module and rotor arm have
>>been replaced, but I feel they are inferior parts. Have decided to fix
>>the problem myself .... then I will know exactly what parts have been
>>changed and with what.
>>
>>Any pointers to get me going would be greatly appreciated!
>
> I'd echo what Badger has said. Warren cursed at my Disco for several
> hours before fitting a third ignition amp - the one off mine and his
> 'known good one' both tested fine on his tester, but only the third
> bugger actually stopped it hunting and losing power.
>
> I've also had a visibly perfect rotor arm cause problems. They are
> cheap enough to replace regardless.
>
> Don't pay stupid LR money for ignition amps - they want £100+ plus
> vat. Factors will do them for about 20 odd quid.
>
> I think your amp will be behind the coil, not on the dizzy.
>
> Also check the stepper motor (on the plenum chamber). Worth cleaning
> out, as they can cause problems. The garage should have been able to
> test this however, but well worth looking at.


Having spoken with Steve today it doesnt sound like stepper motor - the
symptons are far too "sudden stop" - I know when I cleaned the stepper (and
replaced) on my rangie it was more of a lumpy idle issue rather that the
rough running with sudden stop that Steve has had on the disco

Si

 

A

Austin Shackles

Guest

• Feb 7, 2005

• #9

On or around Mon, 7 Feb 2005 19:30:41 -0000, "Si K"
<[email protected]> enlightened us thusly:

>
>Having spoken with Steve today it doesnt sound like stepper motor - the
>symptons are far too "sudden stop" - I know when I cleaned the stepper (and
>replaced) on my rangie it was more of a lumpy idle issue rather that the
>rough running with sudden stop that Steve has had on the disco
>

must look at the stepper motor on mine. It has a habit of deciding to idle
at 1500-2000 revs, sometimes.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
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