www.motorcraft.com shows : For a 1991 F150 with 4.9 L ( 300 cubic inch ) straight 6 cylinder engine Motorcraft part # EV111 for 2 wheel drive Motorcraft part # EV118 for 4 wheel drive
The first cylinder from the front on the vehicles right side(passenger).
On a 1991 Nissan pickup with a 4-cylinder engine, the PCV (Positive Crankcase Ventilation) valve is typically located on the valve cover. It is often found near the rear of the engine, where it connects to a hose leading to the intake manifold. To access it, you may need to remove any components obstructing the area, such as the air intake duct.
4 cylinder does not have pcv valve.
From 1991 to 1995 the only engine available in the Ford Explorer was the 4.0 liter OHV ( over head valve ) V6 - six cylinder engine
The EGr is located next to the fire wall, next to the valve cover on the drivers side of te engine. good luck
The Commodore is made of cast iron and both use two-valve-per cylinder iron heads. The engine was used in the 1991 second series by Heldon.
The firing order for a VW Jetta 1991 4-cylinder 1.8 is 1, 3, 4, 2. The number 1 cylinder is closest to the pulley on the engine.
the engine serial number is on the back of the block, behind the passenger side cylinder head. Not easy to access.
To change the PCV valve on a 1991 Chevy S10 with a 4-cylinder engine, first, locate the valve, which is typically found on the valve cover or the intake manifold. Disconnect the hose attached to the PCV valve and twist the valve to remove it from its socket. Install the new PCV valve by pushing it into place and reconnecting the hose. Finally, ensure everything is secured and check for any leaks before starting the engine.
The PCV valve on a 1991 Dodge Dynasty 3.0 engine is on the passenger side of the vehicle. It is on the crankcase.
it is the first one in line at the front of car
its on the valve cover right behind the oil fill cap..