On Tue, 7 Oct 2003 02:03:53 +0100, "Raymond Ramsey"
wrote:

My '95 4.0 Cherokee has an LPG conversion. There is a selector switch giving
the following options 1-Petrol..2-LPG..3-Start using Petrol automatically
switch to LPG shortly after starting. I've been advised selecting 3 is the
best option.

Cold starts do not seem to be a problem. However starting when engine is
warm either switch position 1 or 3 is murder! The engine miss-fires and runs
rough. Obviously a problem with the Petrol feed. Switching to 2 and all
seems fine (so far) as does switching to 3 after the engine has been running
for a couple of minutes.

It seems obvious the problem is running using petrol. Have any of you any
ideas on where to start looking? I assume the electrics are fine as all runs
well using LPG.

Any suggestions would be appreciated, along with where to look for the parts
that might be faulty/blocked. I've only had the motor a week and a bit so
the geography under the bonnet is alien to me

I need help!

Cheers, Ray

LPG cars are quite widely used in Australia. I have owned several and have one at the moment.

The first thing we are told to do when there is any rough running is
to change the air cleaner filter. Most taxis run on LPG and they
change air filter elements at 12000km (7,500 miles). The taxi people
are the best ones to do the maintenance as they have the greater
experience.

Our gas is 13.8 pence per litre at the moment.

All the best

Russell