Hey Mike, thanks for the response, but I wasn't the thread starter, so I don't want to look like I hi-jacked the thread. But I'm interested in your response. The truck has 125K miles on it. I do have a "lead-foot" so I don't ever expect to get top MPG numbers. I have a Land Rover service manual CD with someadditional info on it, one is anoriginal dealerfact sheet, it shows that the best MPG for this vehicle is about 15MPG?! So I was almost satisfied with 12.5mpg given the way I drive. Do you think new O2 sensors will improve things? It does seem to foulnew plugswithin a few days, with plugs # 4& 6 being the worst. (This bank also has a leaky exh manifold @ the collector/downpipe)After the plugs are a few days old the motor seems reluctant to go over 3000rpm. With brand new plugs it seems to be responsive up to 4000rpm. Right now the truck is parked due to an oil pressure issue that I'm working thru (slowly) after trying a trans fluid oil flush, but that's another thread I'll get too later when I've investigated more........(Oil pan removal)

 

Need to fix that exhaust leak, do the 02 sensors and replace the plug wires, Magnacor's, if not done, then decarbon the engine.
Mike

 

I've seen ads for the Vornado's for the Disco. This is supposed to deliver more air into the engine and increase gas mileage. Do anyone know if these work? They are all over ebay for like $15.

 

I have had one on my truck for 3 years, I don't believe they do what they say although it sounds good, it isn't worth the $66 plus.
Mike

 

Hey Mike, 1st off I want to say thanks for all the great info you put on here. As far as O2 sensors, do aftermarket ones work ok or stick withOEM? I saw some aftermarket ones on Ebay for $25. What are your recomendations on spark plugs, cap & rotor brands? I've been using Champion plugs so far, I was told by several people to stay away from NGK on Rovers & Jags. You say "decarbon" the engine, do you mean pull the cyl heads and clean combustion chambers & ect?

I know in the UK they were a bit slow in getting up to date with using catalytic converters on cars, weren't mandated until 1992 I think? I was wondering if a lot of these rough running issues could be avoided by removing the stock cats and putting some hi-flow ones in place? Maybe the stock ones arerestricting the exhaust flow too much because the engine was not really designed properly to run with cats?

 

You have alot of questions how about you cal me and I'll answer all of them.
Mike
303-862-7680
Colorado

 

OK thanks Mike, will call later this week. I'll be tied up with work until then. I have lots of questions about oil pressure/flow as well!