I'll start by saying Hi all and thanks in advance for any advice. Here goes.
I have a 1993 Cherokee Ltd. It runs on petrol as well as LPG. At times she starts up 1st crank and runs like a dream, whether on petrol or gas. I arrive wherever i'm going come back to the Jeep and it's a none starter. Doesn't matter whether i'm starting on either fuel, it just wont go. Sometimes it fires and starts but then the revs just die and she cuts out again. Sometimes it just wont start at all. Twice i've had it recovered and by the time its back on my drive and off the recovery truck she starts first time again.
I've had the coil tested ok, new disributor cap and rotor arm and HT leads. Plugs are fine, spark is fine and according to the nice recovery man, fuel is getting there fine. I though it may be the crank sensor so did the diagnostic check and get the codes 12 and 55. I have had the battery off to re-charge so expected code 12, i understand that code 55 means the end of the check. This indicates crank sensor is ok i presume.
I tried to start the Jeep on petrol again to no avail but she started on LPG first turn of the key. I let her temp rise and sprayed some carb cleaner in, this stopped the engine. I tried to start her again and after a couple of cranks she started ok. I let her idle for about ten mins and turned her off. I then tried to start her again and now she wont start again. She tries and fires but just wont start. If I go back to try tomorrow she will more than likely start again.
I'm at the end of my tether with it, any suggestions or advice gratefully received. I love my Jeep and am lost without it at the mo as she's my only form of transport.
Help Please.
Thanx Muchly.