The O2 sensor can be picked up at NAPA or other local parts stores. You will need to remove the Intercooler to get access. It will be worth the money to buy the proper socket to remove it.
The EGR is mounted on the back of the upper intake manifold. It is connected to a steel tube that runs around the back of the engine to the exhaust manifold. You will need to loosen the tube nut then remove the EGR valve. The EGR valve has a silver disk with a vacuum line attached to it. The is a 1/2" port that goes to the intake. You can use a small screw driver to punch through the carbon build up and a small brush to clean it out. You might want to use some Carb cleaner.
Speaking of the PCV valve, you might want to take that out and clean as well. If the seat of the valve is gummed up with oil residue from sitting a couple of years, then it could be allowing crankcase gases (oil fumes & blow-by) when it should be closed.
The EGR is mounted on the back of the upper intake manifold. It is connected to a steel tube that runs around the back of the engine to the exhaust manifold. You will need to loosen the tube nut then remove the EGR valve. The EGR valve has a silver disk with a vacuum line attached to it. The is a 1/2" port that goes to the intake. You can use a small screw driver to punch through the carbon build up and a small brush to clean it out. You might want to use some Carb cleaner.
Speaking of the PCV valve, you might want to take that out and clean as well. If the seat of the valve is gummed up with oil residue from sitting a couple of years, then it could be allowing crankcase gases (oil fumes & blow-by) when it should be closed.
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