OT - Landrover Discovery 2 4 litre v8 juddering
 

Hi guys,

Thought I'd run this by you, as you are smarter than the average bears.

Filled up with a couple of premium unleaded, which it was running happily on
when I bought it. Within 2 days, it would run fine up to 40 mph, then start
intermittent juddering. Idling was ok. With the tank now 1/4 full, filled it
up completely with super unleaded which it normally runs on (and which the
handbook recommends). Despite this, juddering continued.

40 mph is when the torque converter locks up in 4th. However, ran around the
block in low ratio which locks up the torque converter, and no judder.

After 2 weeks, problem has now gone away completely. I've also gone all of
that petrol in that time - it fixed itself in the final 4 gallons of fuel
(25 US gallon tank).

No OBD2 fault codes in either gearbox or engine, check engine light remained
off.

Any thoughts ? I thought it was the torque converter, but that doesn't
explain why it fixed itself. Perhaps some very slight fuel contamination ?

Dave

Re: OT - Landrover Discovery 2 4 litre v8 juddering
 

I think the probelm is written on the front. 'Land Rover'. The British just
can't make a reliable car.. ;-)

Just kidding :-D

Sounds like maybe some water in the gas?

Carl


"Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
news:11Tdj.69072$S37.35907@fe3.news.blueyonder.co. uk...
> Hi guys,
>
> Thought I'd run this by you, as you are smarter than the average bears.
>
> Filled up with a couple of premium unleaded, which it was running happily
> on
> when I bought it. Within 2 days, it would run fine up to 40 mph, then
> start
> intermittent juddering. Idling was ok. With the tank now 1/4 full, filled
> it
> up completely with super unleaded which it normally runs on (and which the
> handbook recommends). Despite this, juddering continued.
>
> 40 mph is when the torque converter locks up in 4th. However, ran around
> the
> block in low ratio which locks up the torque converter, and no judder.
>
> After 2 weeks, problem has now gone away completely. I've also gone all of
> that petrol in that time - it fixed itself in the final 4 gallons of fuel
> (25 US gallon tank).
>
> No OBD2 fault codes in either gearbox or engine, check engine light
> remained
> off.
>
> Any thoughts ? I thought it was the torque converter, but that doesn't
> explain why it fixed itself. Perhaps some very slight fuel contamination ?
>
> Dave
>
>

Re: OT - Landrover Discovery 2 4 litre v8 juddering
 

Oi, I represent that remark ! We create cars that breakdown very reliably.
This one has a genu-whine all-american v8 in it, out of a 1961 Buick
Skylark.
Since we got it in 1961 it has been vastly improved from its 3.5 litre 185hp
to its current 188hp. Clearly this Bosch Motronic engine management system,
4 coils and over 40 years of continuous development have resulted in a very
worthwhile 3 hp. So, I don't want to hear Mike banging on about how great
carburettors any more ! Oh, and boring it out by another 500cc helped a bit
as well (actually it was only 400cc but calling a 3.9 a 4.0 makes it sound
more exciting. Especially when it's the same 3.9 just with a different
intake).

I'm thinking water in the gas as well, although that is very unusual here.
The ECU should have logged misfires for that though - strange.

Dave



"Carl S" <carlsaiyed@REMOVE.hotmail.com> wrote in message
news:cuidnV8ZYaGclOXanZ2dnUVZ_v2pnZ2d@comcast.com. ..
> I think the probelm is written on the front. 'Land Rover'. The British
just
> can't make a reliable car.. ;-)
>
> Just kidding :-D
>
> Sounds like maybe some water in the gas?
>
> Carl
>
>
> "Dave Milne" <jeep@_removethisbit_milne.info> wrote in message
> news:11Tdj.69072$S37.35907@fe3.news.blueyonder.co. uk...
> > Hi guys,
> >
> > Thought I'd run this by you, as you are smarter than the average
bears.
> >
> > Filled up with a couple of premium unleaded, which it was running
happily
> > on
> > when I bought it. Within 2 days, it would run fine up to 40 mph, then
> > start
> > intermittent juddering. Idling was ok. With the tank now 1/4 full,
filled
> > it
> > up completely with super unleaded which it normally runs on (and which
the
> > handbook recommends). Despite this, juddering continued.
> >
> > 40 mph is when the torque converter locks up in 4th. However, ran around
> > the
> > block in low ratio which locks up the torque converter, and no judder.
> >
> > After 2 weeks, problem has now gone away completely. I've also gone all
of
> > that petrol in that time - it fixed itself in the final 4 gallons of
fuel
> > (25 US gallon tank).
> >
> > No OBD2 fault codes in either gearbox or engine, check engine light
> > remained
> > off.
> >
> > Any thoughts ? I thought it was the torque converter, but that doesn't
> > explain why it fixed itself. Perhaps some very slight fuel contamination
?
> >
> > Dave
> >
> >
>
>

Re: OT - Landrover Discovery 2 4 litre v8 juddering
 

Dave Milne wrote:
> Hi guys,
>
> Thought I'd run this by you, as you are smarter than the average
> bears.
>
> Filled up with a couple of premium unleaded, which it was running
> happily on when I bought it. Within 2 days, it would run fine up to
> 40 mph, then start intermittent juddering. Idling was ok. With the
> tank now 1/4 full, filled it up completely with super unleaded which
> it normally runs on (and which the handbook recommends). Despite
> this, juddering continued.
>
> 40 mph is when the torque converter locks up in 4th. However, ran
> around the block in low ratio which locks up the torque converter,
> and no judder.
>
> After 2 weeks, problem has now gone away completely. I've also gone
> all of that petrol in that time - it fixed itself in the final 4
> gallons of fuel (25 US gallon tank).
>
> No OBD2 fault codes in either gearbox or engine, check engine light
> remained off.
>
> Any thoughts ? I thought it was the torque converter, but that doesn't
> explain why it fixed itself. Perhaps some very slight fuel
> contamination ?

gremlins

Sticky injector or clogged fuel filter can cause something like that.

--
DougW

Re: OT - Landrover Discovery 2 4 litre v8 juddering
 

Many US states are running ethanol in fuel now, so you would have to have a
LOT of water in the fuel before it would separate. I don't know what you
guys have in your fuel, Glenlivet? I would pull the filter and blow it
backwards into a clean can to see whats in it.
I drove an early Series 2 around today with the top off, fun truck.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty