Vehicle & Technical > Range Rover

Stainless exhaust, high co emissions, erratic lambard sensor, cats cut out.....

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Skibum346:
From past experience... check the air intake hoses after the air flow sensor... we had idling, sputtering, stalling problems and finally found a small split letting un measured air into the system that was confusing the brains of the car... (not me!)

Skibum

Jonny Boaterboy:
Well where to start! I like the idea of removing both the lambard sensors and re fitting the resistor but I'm not sure if it will pass the emissions next mot the engine is running sweet but it has done 168,000 miles now so things will be starting to wear. I am starting develop two lines of thoughts now, my first is that there is a fueling problem somewere, lambard sensors, air flow metre, split in hose (thanks Skibum will check). My second is the MOT man does not know what he's doing! in previous years the Range Rover has flow through emission with loads of emissions left to give out! I think I might take it down to my local Land Rover place and see if they can find a fueling issue..... which I find had to believe as it is running so well at the moment apart from the tic over problem!

I'll let you know what happens.

RRB does it matter what make the lamdars are? I usually try and stick with L.R. But they are £200 each  :shock:

Thanks all for you help, I thought it would be as simple as Jims but life never is!

Range Rover Blues:
I doubt an aftermarket lambda will last another 14 years but if it has an equivelent part number then yes it should be ok.  The LR ones are 3 wire and if memory serves correclty are 5 volt types.

Rossko:
My first thought for poor V8 emissions is look to the ignition - cap, rotor arm,  leads, plugs.   My second thought at that mileage is clapped out camshaft.

How dainty were you hacking out the old cats?  The lambda sensors are suprisingly fragile and will almost certainly be ruined if you hammered the exhaust with them in situ, or welded it.

You do have to use the right 3-wire part, but it doesn't have to come in Landrover box.  You can get genuine NTK parts from a decent motor factors.

cheers, Ross K

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