Nissan Repair: Smokey Engine - Nissan terrano 2.7 miatral 1995, nissan terrano 2, fuel pressure regulator

Question
What should i be looking,will a service help?

Answer
Andrew,

It depends on what the smoke looks like.  That is, if the smoke is white it could be a blown headgasket.  Does it use coolant?  That is, does it use coolant and not leak on the ground?  This would indicate internal comsumption of the coolant and that would be at a minimal a blown headgasket.  If the smoke is blue that would mean blown piston rings or bad valve guides.  If the smoke is black that means an over rich condition which could be caused by a blown fuel pressure regulator, or a stuck injector or two.  If the check engine light is on the computer you might get an indication of what the problem is; providing there is a code stored.