The 1992 model had 8 for sure: 4 for power and 4 for "waste spark." The 1991 model is probably the same and uses the EEC-IV system with OBD-1.
On your Ford Ranger with the 2.3 or 2.5 liter four cylinder engine , with Fords twin plug ignition system : The compression plugs are on the DRIVERS side of the engine
On a 2002 Ford Ranger : The 2.3 liter Dual Over Head Cam four cylinder engine has ( 4 spark plugs )
In a 2000 Ford Ranger : ( the 2.5 liter four cylinder engine , which was the only four cylinder engine offered from the factory for a 2000 Ford Ranger , not like the 2001 model when they started with the 2.3 liter DOHC later that model year )
There are ( 2 ) sparkplugs per engine cylinder for a total of ( 8 ) sparkplugs on your 1997 Ford Ranger 2.3 liter 4 cylinder with Fords twin plug ignition system
On a 2005 Ford Ranger : The 2.3 liter Dual Over Head Cam , four cylinder engine has : ( 4 spark plugs )
The 2.3 liter 4 cylinder engine has ( 8 spark plugs ) , twin plug ignition system The 2.9 liter and 4.0 liter V6 engines have ( 6 spark plugs )
The 3.0 liter and 4.0 liter V6 engines have ( 6 ) spark plugs The 2.5 liter 4 cylinder engine has ( 8 ) spark plugs with Fords twin plug ignition system
( 8 ) sparkplugs for the 2.3 liter 4 cylinder engine in a 1997 Ford Ranger with Fords twin plug ignition system
#1 cylinder is at the front of the engine ( 1, 2 , 3 , 4 front to rear )
Just on the 2.3 liter - 4 cylinder engine ( takes 8 spark plugs ) The 3.0 L and 4.0 L - V6 engines have 1 spark plug per cylinder ( 6 in total )
Depends on your engine: 1.0 liter 3-cylinder = 3 spark plugs, 1.3 liter 4-cylinder = 4 spark plugs
The Ford 4.0 liter V6 engine has ( 6 spark plugs )