hi,
my disco 2002 facelift 4.0 v8 has a lpg conversion and is driving me mad!it has a random misfire and keeps putting the management light on.it has gone into what appears limp mode a couple of times,ie no power and 40mph max.so far it has had a new airflow,both coil packs,4 new o2 sensors,plugs and leads,throttle position sensor.
while better,it runs lovely but still puts the light on and occasionally misfires.various fault codes have come up,includingpo308,304306,302 ,cyl misfires,p1300,p0154,155 o2 sensors.
current codes today are po135,155,141,161,154 all pointing to misfires and o2 sensors.it has just had new sensors fitted.
yesterday it drove superbly but the management light came on and went off again approx. 10 mins later but with no obvious running fault.today it starts and revs but is virtually undrivable with the fault codes above shown.
i'm now running out of patience with it and am wondering what else it could be.it will put the light on running either gas or petrol.
any suggestions?

Have you had the fuel trim adaptions reset?
Having fault codes cleared does not reset them, neither does disconnecting the battery.
They would need resetting after new lamdas, MAF, Crank sensor etc.
Hope this helps you

thanks,is that a dealer job?

If you can find someone with Nanocom or Hawkeye it can be done no prob but avoid any dealership as it will cost you dearly.

Hello Again,
Really need help going away and hoping and praying to tow our caravan with our V8 but unless we can find someone out there who can tell us what is wrong we will not be going, is there anyone out there in shreswbury/shropshire who has a Nanocom or Hawkeye that can help us please

Have a look on www.discovery2.co.uk/ Nanocom Locator, get help from your Land Rover Buddies!!!
There maybe someone close to you
os have a look on www.thed2boysclub.co.uk
you will need to register first though