On or around Wed, 3 Sep 2003 21:49:46 +0100, hugh ]
enlightened us thusly:

In message , Dave Wheatley
writes
Yes the conversion was already done- I had to have it certified by an
approved installer for the insurance company. In their defence they
were only asked to check for compliance & remedy those. I didn't ask
for the system to be checked over for any running problems etc, because
I hadn't been having any.

AIUI the approved installer who did the checking removed one of the
hoses to the vaporiser - and his spluttering/coolant loss problem
started immediately after that.

yes, but he's also reported that the vapouriser is hot, so it's not
airlocked and freezing.

dodgy setup of the LPG system could be the case, as has been suggested, if
it behaves correctly on petrol.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)

Thanks for everyones input, if I ask daft questions please be sure to
point them out! I WILL find the problem..... My wife thinks it's really
funny now- nightly routine of getting home, pull the bonnet catch, grab
a coffee and try to see if theres anything amiss. There are a few rubber
pipes with 'scale' around the joint as if there have been minor leaks,
but all the clips are tight and theres no sign of the slightest drip. I
make sure I check with it hot after a rubber pipe incident on my old
Laguna that only came to light when up to temp.

If your high tension ignition components are not in good
condition then the spark can try to find its way home via other
routes. This often involves backfires in the inlet manifold, but can
involve rough running. On my Volvo I had to replace everything, the
plugs, the coil, the ditributor cap and rotor arm, and the HT leads.
But it did have a very destructive backfire habbit.

I have this week replaced the dist' cap, rotor arm, plugs and leads.
Theye are routed correctly also as per the diagram in the manual. I've
not done the coil yet- I guess that's worth a try next.

Does your answer above imply that you only lose coolant when running
on LPG? If so, maybe you have an overheating problem caused by poor
setup.

No, it seems to be all the time. The light goes off after the engine is
up to temperature, I assume from activating the sensor in the expansion
tank. But it always comes back on and needs topping up once cool again.
The performance with the engine 'cold' is spot on (on gas as well as
petrol) acceleration is fine- especially now it's a bit cooler in a
morning! Tracking these faults is a nitemare! The Laguna I got rid of
kept saying abs & fuel injection faults - turned out to be the speedo
cable, not sensing road speed properly- bloody electronics!! Lets go
back to mechanical instead of all these sensors.....


Dave

"Dave Wheatley" wrote in message
...
I have this week replaced the dist' cap, rotor arm, plugs and leads.
Theye are routed correctly also as per the diagram in the manual. I've
not done the coil yet- I guess that's worth a try next.



Dave

About 40 years ago I had a car that ran fine cold but slowly got worse as it
heated up, it got to the point where it would not start if hot. I changed
the coil and this solved the problem, it seems that the coil was breaking
down once hot and giving a very poor spark.
Swapping the coil might help.

Good luck

John

On or around Thu, 4 Sep 2003 22:33:35 +0100, "John Belt"
enlightened us thusly:


"Dave Wheatley" wrote in message
. ..
I have this week replaced the dist' cap, rotor arm, plugs and leads.
Theye are routed correctly also as per the diagram in the manual. I've
not done the coil yet- I guess that's worth a try next.



Dave

About 40 years ago I had a car that ran fine cold but slowly got worse as it
heated up, it got to the point where it would not start if hot. I changed
the coil and this solved the problem, it seems that the coil was breaking
down once hot and giving a very poor spark.
Swapping the coil might help.

condenser (capacitor) can do this too.
--
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".

Have you checked the plug cables with an ohm meter.??
the spark plug gaps should also be adjusted in about .20mm as lpg requires a
smaller gap.
A rule of thumb is that if there is a missfire on petrol, it will be
ampliefied 10 fold on lpg,
a missfire on a v8 is easy to miss.
check the evaporator to manifold hose for water, evaporators have a tendency
to leak water internally.
hawkeye

"Dave Wheatley" wrote in message
...
Tonight while running on lpg sat in traffic my RR started misfiring on &
off then seemed ok. Then traffic moved and as I tried to move off it
started spluttering, almost stalling. I quickly flicked over to petrol &
it was fine. A few more 'tests' on the journey proved that it is only on
gas that it happens. I'm having to top up the rad with coolant as the
dash light keeps coming on - I've pinpointed that to the expansion tank
cap- I can hear it escaping when hot, so I'll get one of those in the
next few days. The engine isnt overheating but I wondered if the two
things could be related seeing as the pipework flows through the gas
assembly. I know the gas level indicators are usually a way out but I'm
easily 60/70 miles from being empty (I use the trip meter to guage it)
There are no obvious faults (hanging wires etc)

Or any other ideas anyone please.

Dave

test
"Austin Shackles" wrote in message
...
On or around Wed, 3 Sep 2003 21:49:46 +0100, hugh ]
enlightened us thusly:

In message , Dave Wheatley
writes
Yes the conversion was already done- I had to have it certified by an
approved installer for the insurance company. In their defence they
were only asked to check for compliance & remedy those. I didn't ask
for the system to be checked over for any running problems etc, because
I hadn't been having any.

AIUI the approved installer who did the checking removed one of the
hoses to the vaporiser - and his spluttering/coolant loss problem
started immediately after that.

yes, but he's also reported that the vapouriser is hot, so it's not
airlocked and freezing.

dodgy setup of the LPG system could be the case, as has been suggested, if
it behaves correctly on petrol.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)

test
"Austin Shackles" wrote in message
...
On or around Wed, 3 Sep 2003 21:49:46 +0100, hugh ]
enlightened us thusly:

In message , Dave Wheatley
writes
Yes the conversion was already done- I had to have it certified by an
approved installer for the insurance company. In their defence they
were only asked to check for compliance & remedy those. I didn't ask
for the system to be checked over for any running problems etc, because
I hadn't been having any.

AIUI the approved installer who did the checking removed one of the
hoses to the vaporiser - and his spluttering/coolant loss problem
started immediately after that.

yes, but he's also reported that the vapouriser is hot, so it's not
airlocked and freezing.

dodgy setup of the LPG system could be the case, as has been suggested, if
it behaves correctly on petrol.
--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that
"For millions of years, mankind lived just like the animals. Then
something happened which unleashed the power of our imagination -
we learned to talk." Pink Floyd (1994)