Vehicle & Technical > Range Rover

Intermittant rough running fault

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gt.jacko:
Hi I have a defender fitted with a 4.2 lse engine and auto box, the last couple of times i,ve driven it it has a really bad running fault, it will suddenly start to run really rich clouds of black smoke from exhaust and I can almost see the fuel gauge going down :'(. If you stop it and restart it seems ok again until revs get up above 2000 rpm , this morning i drove into stockport which is 15 miles away from me on the way there it never missed a beat then coming back it did it nearly all the way home on and off bloody thing anyone any ideas please.

Cheers
            gary :help:

Rossko:
Dried leaves or sock in air filter box, faulty oxygen sensor, faulty coolant temp sensor (the EFi uses a different one from the gauge, don't let that confuse you), faulty Airflow Meter, chafed wires (check where your loom has been put through the bulkhead), split vacuum pipe to fuel pressure regulator or duff regulator, pinched fuel return hose.

Bowie:
Coolant temp sender?

Loose air flow meter connection? These corrode slowly over time and make running 'interesting'.

Lambda probe.

Pretty much all it can be -if it all looks OK, then try the Hotwire diagnostics in the back of the Haynes manual -it's a lift straight from the LR workshop manual.

gt.jacko:
thanks guys will have a look a those as i need to get it sorted it drinks fuel at an alarming rate when it goes off on one cost me £20 to do 32 miles yesterday and of course it wont idle at junctions etc so it,s apain in the backside to drive like that :evil:

Range Rover Blues:
Quick question, did the installation include ALL the engine sensors, road speed, gearboc etc and what tune select resistor is fitted?

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