Go to this site and CHECK IT OUT! http://autorepair.about.com/library/firing_orders/bl-fo-4639.htm
Yes , the 2.5 litre four cylinder engine in a 1999 Ford Ranger is a Single Over Head Cam engine
The 1999 Ford Ranger 3.0 liter engine throttle positioning sensor is located on the cylinder head. The sensor will be near the middle of the cylinder head.
Inspect at 120,000 miles , replace if needed ( Ford maintenance and the Gates website ) for the 2.5 liter , 4 cylinder , in a 1999 Ford Ranger
under the brake booster
For a 1999 Ford Ranger , 2.5 liter four cylinder engine : ( 117 horsepower at 4500 RPM from the factory )
rear axle housing
belt
You have a 1999 Ford Ranger 3.0.
the ford site says 14.2 for a 3.0L 6cyl
The hydraulic clutch slave cylinder is inside the manual transmission bellhousing
The check engine light on a 1999 Ford Ranger is between the full mark of the gas gauge and the left turn signal arrow
( 5W-30 ) for the 2.5 liter 4 cylinder , 3.0 and 4.0 liter V6 engines ( according to the 1999 Ford Ranger Owner Guide )