Revs keep raising and lowering

Drive with elevated engine speed for 30 minutes, motorway or dual carriageway driving using a lower gear to get the revs up about 3500 for as long as possible will do it or use the option in the Snap On tools OBD2 reader to run the required program.
Basically all you need to do is heat up the "soot filter" or particulate filtre to burn off the soot that is clogging it.

be looking at emissions controls vacuum systems for leaks or broken hoses..

there is a tps located on the intake where the inlet tube for air intake connects, it would be on the left side of the throttle body. does the trk run rough on idle? up/down sputter sometimes stall? Is check engine light on? if no light,check all vacuum lines for cracks/splits loose fit. do this by spraying carb choke cleaner on connections motor rpms will change if leak is present. also spray around perimeter of intake housing where mates with lower intake if engine revs you have bad intake gasket.I Just replaced upper and lower intake on my 98 and shazaam, runs like it should. but do your checks first,unessasary fixes are costly and **** you off.

Hi Guest,

This is normal. As the engine rev's higher the oil pressure goes up, revs lower, pressure lower.

Jeeps just use a more sensitive gauge than most.

Best regards
Mike

Change fuel filter and air filter. If that doesn;t help you may have a fuel transfer pump pressure problem.

If an air suspension is placed in the 4x4 then yes this could be done. While I am not certain I believe many Land Rovers have air systems to raise and lower the truck for road or off-roading. As practice though; no, the Shogun / Montero would not have this system (at least not in the states).
I hope this may have assited you,
Tom

This is not necessarily a problem with your truck. The weather this summer with the higher heat and humidity can easily push a cooling system beyond its capacity, so unless this has been going on for a long time, or persists into the cool fall weather, I wouldn't be too concerned. Keep an eye on it and a thimbs up for having the insight to figure out a quick solution to save a motor. Hope this helps.

IS IT FUEL INJECTED OR CARBURETED?

turbo must have a problem or remember tro vehicles have turbo lag. . . usually mitsu's turbos start giving power around 2500prm - 3000rpm. .

but usually on older turbo diesel mitsus the turbos are the first to go. . . .