i have a 2004 l322 4.4 v8 last few days my engine management light has came on a few times
i have cleared the fault with my rsw allcomms kit but after8-10 miles it comes back on the faults are as follows


Lambda control adaption exceeds lower limit bank 1. Last occurrence - maximum signal

Lambda control adaption exceeds lower limit bank 2. Last occurrence - maximum signal

THE RR IS LPG CONVERTED, RUNS AND STARTS FINE,drives great
ARE THE Lambda sensors faulty
any ideas thanks everyone 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

this sounds like air to fuel mismatch, the amount of air entering the engine is greater than what is passing the maf sensor ,check if you have any air/vacuum leaks
make sure the large black air duct that runs from the air filter to the throttle housing on the inlet manifold is secure as these do come adrift when replacing the air filter .
also check the pcv valve pipes at the rear of the engine as these collapse and go all goey  1990 3.5 v8 defender
2000 4.6 v8 30th anniversary prins lpg
2004 4.4 v8 vogue prins lpg
2011 4.4 TDV8 Vogue
faultmate extreme
rsw allcoms
Autel 906BT
Gap iiD tool

hi klf400
will check the pipes etc as you suggest
thanks
steve 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

hi
does anyone have a picture / drawing to show where the pcv valve is located, with the pipes
thanks
steve 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

might be shown in RAVE [download link in wiki] ... - .- -.




Y. O. L. O.
.

hi stan
found it using "search"
thanks 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

Is it LPG'd?

Yes it is Gaz

Very common fault codes on V8 Petrol LPG RR's.

Very difficult to get a permanent cure but I think it the oxygen sensors detecting weak or strong mixture in the exhaust gasses.

Probably needs a bit of tweaking.

Gary

HI ALL
checked the two top pcv pipes and they are soft and rotton, one has a slight split, going to get two new pcv breather pipes from dealer, unable to find alternative supplier,
will keep you updated i will take a picture of the old rotton breather pipes, and post it here
thanks
all 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

steve
there are 4 pipes to change , 2 large pipes 1 short smaller pipe that goes on the oil seperator and oil tube and the last 1 a long small pipe from the pcv valve to the inlet manifold, they all go rotten and gooey
also for peace of mind i would change the pcv valve
check this out
http://www.rswsolutions.com/index.php?opti...;Itemid=78 1990 3.5 v8 defender
2000 4.6 v8 30th anniversary prins lpg
2004 4.4 v8 vogue prins lpg
2011 4.4 TDV8 Vogue
faultmate extreme
rsw allcoms
Autel 906BT
Gap iiD tool

only the two top pipes are gooey. the other ones are ok 2007 supercharged ,Cairns Blue with Navy & Parchment Interior

okay fair enough but they are small and can become blocked, but do click on the link i posted the pcv valve is very important and must be working properly 1990 3.5 v8 defender
2000 4.6 v8 30th anniversary prins lpg
2004 4.4 v8 vogue prins lpg
2011 4.4 TDV8 Vogue
faultmate extreme
rsw allcoms
Autel 906BT
Gap iiD tool

Any updates on these pipes? How did you get on, problem cured? Ive had a similar issue-engine light is on. i keep clearing it then it returns within 10 miles. It has been running fine until today. I noticed when stationary the engine feels ever so slightly lumpy-and i mean very slightly. I did notice that when the big viscous fan kicks in the enine doesnt feel as lumpy.
I replaced the two o2 sensors infront of the cats recently to cure the engine light as the fault codes pointed towards them. but the light still comes on. Any help much appreciated.

Fraser

HI
REPLACED the two top pcv pipes as they were soft and perrished, one has a was split, got two new pcv breather pipes from dealer, now all ok 2007 supercharged ,Cairns Blue with Navy & Parchment Interior