System Specifications

BTDC - Before Top Dead Center.
OHV - Overhead Valve.
OHC - Overhead Cam.


FOOTNOTES

1 - Wrap shop towel around fuel diagnostic valve to prevent fuel spillage. Connect a suitable fuel pressure gauge to fuel diagnostic valve. Energize fuel pump & note fuel pressure reading.

2 - Idle speed on man. trans. models is adjusted in Neutral. On auto. trans. models, idle speed is adjusted in Drive (D). When checking idle speed, set parking brake & block drive wheels.

3 - Before removing wires from distributor cap, determine location of No.1 wire in cap, as distributor position may have been altered from that shown at the end of this chart.

4 - Controlled by automatic idle speed control.


5 - Firing order Is 1-3-7-2-6-5-4-8. Refer to Fig. B for spark plug cable orientation.

6 - Equipped w/hydraulic lifters & non -adjustable rocker arms. No adjustment necessary.

7 - Firing order is 1-3-4-2. Cylinder numbering from front of engine to back is 1-2-3-4.

8 - Base timing.

9 - Collapsed tappet gap.

10 - Ranger, 56 - 72 psi.
Ranger w/Flex Fuel Option, 55 - 75 psi.