At idle I was getting about 1 to 1.2 % co2. Reducing to 0.5-0.6 ish when
running
the engine at 2-3000. rpm.

I'm a bit uncertain here due to the fact I've had conflicting quotes on what
to tune the co2 to for LPG.

What C02 do you suggest?


"Austin Shackles" wrote in message
...
On or around Sun, 9 Nov 2003 21:56:23 -0000, "David Cawkwell"
enlightened us thusly:

I installed an LPG kit in a citroen AX (well I actually took a lot of the
components
from my previous car which expired). The citroen has a carb and I have
tuned
the vapouriser and flow value with an exhaust gas analyser.

The car starts and runs fine from warm. I notice the engine needs a few
more
revolutions to start than petrol. However from cold the engine shows no
willingness
to start on lpg. I have increased the time that lpg is supplied to the
engine when starting
and this allows it to burst into life a little then it dies.

Since the car has a mechanical petrol fuel pump it can take a long time
cranking
to get it to fire if I forget to switch back to petrol before the last
run
of the day.

Any advice here or should I just stick to finishing on petrol for the
night?


what figures did you tune the LPG to? Mixture is fairly critical. If
it's
too lean, it'll not start readily from cold, if too rich, it'll "flood".
get it right, it should work... You may need to play with vapouriser idel
settings, depending on what yer vapouriser is.


--
Austin Shackles. www.ddol-las.fsnet.co.uk my opinions are just that

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