Then you'll have to start with vacuum leaks. To check for vacuum leaks, start with a visual inspection of the hoses for cracks and dry-rotting. You can also spray water over the engine while it's still cool to see if it gets sucked in somewhere. If you have access to a smoke machine from an auto parts store that rents or borrows tools, inject the smoke into a vacuum hose or the intake manifold, then watch if it sneaks out somewhere.
I show an EGR valve for your engine. If there is one, it will be shown on the emissions sticker under the hood.
Also check the fresh air tube between the mass air flow sensor and the throttle body. Any leaks there will let in air that isn't measured, so no fuel will go with it. That will cause a lean condition.
Saturday, April 11th, 2015 AT 11:23 PM