In message , Raymond Ramsey
writes
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





Faulty emulator perhaps if you have them fitted. Most systems use these
to switch off the petrol injectors when running on gas. When engine is
misfiring disconnect one plug lead at a time to see if one makes no
difference.
--
hugh
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