Still working on this one but cannot get the car to start on Petrol.
Hence thought I may have broken the fuel pump as suggested by the good Dr.
Replaced the fuel pump (yep its damn fiddly to get in and out) and still will not start. To confirm there is about half a tank of petrol in the car and all was well and working before the alternator died.
To confirm:
Car will not start or run on petrol but runs on LPG OK
New fuel Pump fitted with no change to the above status
Fuel Pump relay replaced - No Change
Fuel Pump Fuse checked and all good
Old fuel pump tested on the bench and appears to work
New fuel pump can be heard working in place if I put a 12v probe onto it from the battery to the 4 pin connector
Looking at the 4 pin connector itself that attaches to the fuel pump it has 4 wires and using a multimeter I do get some volts but not many (3v) with the key out or in position 2.
Now does anybody have a wiring diagram so I can check the 4 wires or what I should be reading? I have also been going through the Fuel Supply systems test on the Service manual and not got much further with that also.