Just a quick update on this an another plea for help
1. Gave the vehicle a full (petrol) service. New oil, filters, plugs (NGK twin-electrode). No change to running.
2. Installed a new set of Denso Iridium plugs. No change.
3. Installed new LPG splitter and filter (old one was pretty manky when I pulled it apart). No change.
4. Stripped it all down and pulled out the LPG injectors. Soaked them for 48 hrs in a couple of cans of carb cleaner. Reassembled. It now refuses to run on LPG at all. The vehicle tries to swap and then stalls. If driving, the vehicle tries to swap over - losing all power and then swapping back to petrol after 4-5 seconds. I thought it must simply be a metter of getting some gas through but after repeated attempts I have given up. Running perfectly on petrol.
Before pulling out the injectors I read all the (petrol) ECU codes off:0202/3/4, 0302, 0300 - all injector or misfire errors. I'm pretty sure that these are all caused by the 'bugs' with the LPG systems. I have been running on petrol for a couple of days now and the EML went out after a few miles - it only comes on if I try to switch to LPG.
After reading as many posts on the subject I could find, I tried to read the LPG codes but failed. I took a feed from the grey wire in the 'LPG relay / fuse box' to a bulb and then to earth. I tried this with engine and igniition on and off but failed to get a single flash. Does this mean there are no fault codes stored or an I doing something wrong?
With the injectors - have I knackered them completely? Anything more I can try before I shell out on a new set of injectors?
I'd really appreciate any advice anyone can give - particularly on reading the LPG fault codes.