RRC Running slightly rough plus very hot exhaust pipe

I was driving my 1986 Range Rover classic 3.5EFI the other night on a 15
mile journey, about half way it seemed to be losing a bit of power and
started to misfire a bit. This got worse as the journey continued until
eventually it was running on what seemed like 2 cylinders. Managed to get it
to my parents house and leave it there.
Went back today, checked and pushed all ignition leads, oil was ok, water
was clear so no gasket leak. Started it up, ran sweet as a nut. Went for a
drive and noticed on initial acceleration would run ok, then hold back and
then go again. As time went on the tickover got a little lumpy.
Checked exhaust for emmissions, but seemed clean, but I did notice the
exhaust gas was very very hot and would give you a nasty burn if you left
your hand there. The tail pipe was extremely hot and dropping water on it it
fizzled and evaporated away! I don't ever remember any other car being this
hot.
Could this be an ignition timing issue, or has anyone got any suggestions?

TIA

Martin Coombs

"Martin Coombs" <[email protected]> wrote in message
news:[email protected]
> I was driving my 1986 Range Rover classic 3.5EFI the other night on a
> 15 mile journey, about half way it seemed to be losing a bit of power
> and started to misfire a bit. This got worse as the journey continued
> until eventually it was running on what seemed like 2 cylinders.
> Managed to get it to my parents house and leave it there.
> Went back today, checked and pushed all ignition leads, oil was ok,
> water was clear so no gasket leak. Started it up, ran sweet as a nut.
> Went for a drive and noticed on initial acceleration would run ok,
> then hold back and then go again. As time went on the tickover got a
> little lumpy.

Check the coil when the misfiring occurs. Is it hot or merely warm?
If it's hot then the coil's dead.

--
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could be ignition if its too far out, the distributor hasnt moved has it?
also, very hot exhaust could indicate a weak mixture, i had it on a V8 90
where the manifolds were glowing bight red. maybe a fuel blockage?
Richard


"Martin Coombs" <[email protected]> wrote in message
news:[email protected]...
> I was driving my 1986 Range Rover classic 3.5EFI the other night on a 15
> mile journey, about half way it seemed to be losing a bit of power and
> started to misfire a bit. This got worse as the journey continued until
> eventually it was running on what seemed like 2 cylinders. Managed to get
it
> to my parents house and leave it there.
> Went back today, checked and pushed all ignition leads, oil was ok, water
> was clear so no gasket leak. Started it up, ran sweet as a nut. Went for a
> drive and noticed on initial acceleration would run ok, then hold back and
> then go again. As time went on the tickover got a little lumpy.
> Checked exhaust for emmissions, but seemed clean, but I did notice the
> exhaust gas was very very hot and would give you a nasty burn if you left
> your hand there. The tail pipe was extremely hot and dropping water on it
it
> fizzled and evaporated away! I don't ever remember any other car being
this
> hot.
> Could this be an ignition timing issue, or has anyone got any suggestions?
>
> TIA
>
> Martin Coombs
>
>

Hi Richard

Spoke to someone the other day who also suggested weak mixture/timing, so
have booked the Rangie in next weak to be put on computer and checked out.
Fingers crossed it will not be too expensive.

Martin

"Richard" <richardsemail [email protected]> wrote in message
news:[email protected]...
> could be ignition if its too far out, the distributor hasnt moved has it?
> also, very hot exhaust could indicate a weak mixture, i had it on a V8 90
> where the manifolds were glowing bight red. maybe a fuel blockage?
> Richard
>
>
> "Martin Coombs" <[email protected]> wrote in message
> news:[email protected]...
> > I was driving my 1986 Range Rover classic 3.5EFI the other night on a 15
> > mile journey, about half way it seemed to be losing a bit of power and
> > started to misfire a bit. This got worse as the journey continued until
> > eventually it was running on what seemed like 2 cylinders. Managed to
get
> it
> > to my parents house and leave it there.
> > Went back today, checked and pushed all ignition leads, oil was ok,
water
> > was clear so no gasket leak. Started it up, ran sweet as a nut. Went for
a
> > drive and noticed on initial acceleration would run ok, then hold back
and
> > then go again. As time went on the tickover got a little lumpy.
> > Checked exhaust for emmissions, but seemed clean, but I did notice the
> > exhaust gas was very very hot and would give you a nasty burn if you
left
> > your hand there. The tail pipe was extremely hot and dropping water on
it
> it
> > fizzled and evaporated away! I don't ever remember any other car being
> this
> > hot.
> > Could this be an ignition timing issue, or has anyone got any
suggestions?
> >
> > TIA
> >
> > Martin Coombs
> >
> >
>
>

Martin Coombs wrote in
<[email protected]>

> Hi Richard
>
> Spoke to someone the other day who also suggested weak
> mixture/timing, so have booked the Rangie in next weak to be put on
> computer and checked out. Fingers crossed it will not be too
> expensive.
>

You may have elimiateed it already but it is possible to get similar
symptoms from a weak/broken exhaust valve spring. The valve dosn't close
properly so that cylinder loses compression - hence the slightly rough - and
combustion occurs in the manifold - hence very hot exhaust pipe.

--
PeterMcC
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