Hi

I own a 3.9 V8 Discovery which runs on LPG as well as petrol. I don't know much about vehicles and it has been to several garages where no one has been able to solve the problem so far.

• It runs fine on LPG but not on petrol.
• At present it is missing on 4 cylinders but can not pin point the problem (diagnosed on the lap top but no fault found)
• Coil packs have been changed
• We have even tried running petrol magic through it.

It has been suggested that it may be the injectors. Are these difficult to clean/change.

Unfortunately funds are running low as lots has been spent on doing the above (and changing the radiator)


Any suggestions are greatful

 

Yeah, the problem is the injectors. A carburated engine is very simple to convert to LPG, but a fuel injected one is tricky in the sense that you need to modify the signal from the ECM so that the injectors are not running dry while burning LPG. You may replace the faulty fuel injectors and it will run good for a while, but unless the issue of the injectors running dry gets addressed you will have the same problem shortly. It is not a big issue, it is done all the time by the shops that install the LPG system, they have to know.