When I refer to the right or left side of the unit it will be inference to sitting in the seat.
So if you open the hood and on the left side of the engine you will see the air filter. From the air filter towards the engine you will find the LP Regulator prt #4148661 quantity 1. It is silver in color has two coolant hose's connected to it one on each side a electric solenoid valve on top with a hose coming to it from the LP tank and a third hose under one of the coolant hose's going to the Mixer/EPR.
C02 Sensors Prt # 1646456 quantity 2. One you will find screwed into the exhaust manifold and the manifold will be located directly under the LP Regulator under a heat shield the second one will be located on the exhaust pipe going to the catalytic converter which is located in the counter weight and can be accessed thru the back of the counter weight.