lazy terrano11

[gazterrano]

hi im new on here bit of info would be great , ive recently bought a terrano 11 2.7 2001 love the car very comfy rides nice starts & stops good . my concern is it likes to plod will maintain 50 60 easily but when it sees an hill at times i feel its a 1.6 pulling me!! . i recently purchased this from a garage with only 84000 ive noticed big increase in mpg also at night with headlights behind me ive spotted black smoke & the tick over seems to have dropped couple hundred revs which now produces a droning noise inside . i mentioned all of these to the dealer from what ive read it seems like the mass air flow sencer but he tells me no as it would kick the engine management light on if it was at fault.. not really sure now if its me or maybe some other prob... id be gratefull for any help or suggestions as you prob know what dealers are like once theyve had there money.. cheers