motorcraft . com just shows ( 1 ) oxygen sensor for all available engines in a 1991 Ford Ranger
If it's like a 1991 Ford Explorer ( with the 4.0 liter V6 engine ) It has ( 1 ) oxygen sensor
Looking at the 1991 Ford Ranger - 4.0 L V6 - engine wiring schematic in my Chilton repair manual , it shows ( ONE ) heated exhaust gas oxygen sensor
In a 1991 Ford Ranger : The heads on the 2.9 , 3.0 and 4.0 liter V6 engines are cast iron
yes it has both. at least in my 1991 ford ranger does
It has ( one oxygen sensor ) on the 1991 and 1992 Ford Explorers
Look by the balancer.
I'm taking a guess here that it possibly has 1 - the 1991 and 1992 Ford Explorers with the 4.0 L OHV engine only have 1 oxygen sensor
they are located on the exhaust manifolds
The oxygen sensor is located on your lower exaust pipe just before the cat underneath the car
The 1991 Cadillac Deville oxygen sensors are located on the firewall and the air cleaner housing. The firewall oxygen sensor will be on the drivers side. The air cleaner oxygen sensor will be on the back of the air cleaner housing.
If your looking for the oil level sensor it would be located on the driver side on the oil pan.
The crankshaft sensor shold be on the engine block about midway on the back side.
I don't know if it is the same as the Ford Mustang , but the BAP sensor was mounted on the firewall - good luck
If you mean ignition timing it will be 10 degrees BTC.
oxygen sensor is found on y pipe under the exhaust manifold on 4 point zero six v engines
they are located right at the exhaust manifold
It threads into the exhaust manifold on the back of the engine.
The 1991 Pontiac Grand Prix oxygen sensor is located on the outside of the air filter housing. You will find the sensor on the back side of the air filter housing.
Gas sensor? Not sure what you mean, could it be a Fuel gauge sensor? Oxygen sensor? Fuel pressure regulator?
it is in the side of the oil pan