Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976
Cat. problems?
History:
V8 converted to Lpg, vehicle was misfiring etc and diagnosed with VSR and both heads replaced with new ones, last October.
Now:
Slightly lumpy idle, cant get above 16-17mpg no matter how granny like I drive it. CEL is on, codes are P0420 Catalyst System Efficiency Below Threshold (Bank 1) and P0171 System Too Lean (Bank 1).
I am thinking that the misfiring the cat, but before I spend £500 on a replacement, any thoughts, is there a way to test it.
Cheers
Bill==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
20th Mar 2015 9:48 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
It could equally be a fuel system issue or a degraded O2 sensor.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976
You not supposed to give me multiple choice answers
If it helps, it throws up the code on petrol and gas.
I'll try swapping the sensors over and see if that moves the fault. Are the pre and post cat sensors the same.==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
the cat, but before I spend £500 
on a replacement, any thoughts, is there a way to test it.
