I've checked the factory service manual but it doesn't mention anything about replacing the Oxygen sensor, as some of the people have suggested in previous threads.

Is there a full procedure floating around somewhere, pics would be nice but not necessarily required

 

A full tune up procedure or a O2 sensor replacement policy? A tune, by automotive industry standards, is replacing the spark plugs and changing the oil. If I were to do a tune up, I would change the plugs, oil, worn belts and hoses, and the air and oil filter. If I just bought the vehicle, I would also change the coolant, tranny fluid, and differential oil.

 

I've already done an oil change + filter, plus an alternator belt and I've checked the spark plugs and their alright for now but I want to change them soon aswell as the leads, I;ve had the rear 2 plugs out but had some trouble with the front 2 is there a trick to getting them out because its a pain with all the power steering and A/C right there....