Tune-Up Specifications

The following specifications are published from latest information available. This data should only be used in absence of decal affixed in engine compartment.

Liter/CID 5.2L/V8-318
Spark Plug Gap 0.035

Ignition Timing, °BTDC

Fig. C:

Firing Order [03] As Shown
Man. Trans. [06]
Auto. Trans. [06]
Mark Location Damper

Curb Idle Speed [02]
Man. Trans. [06]
Auto. Trans. [06]

Fast Idle Speed
Man. Trans. [06]
Auto. Trans. [06]

Fuel System Pump Pressure, psi 35-45 [01]
Valve Lash [08]


BTDC -- Before Top Dead Center.

[01] -- Disconnect battery ground cable. Remove fuel tank filler cap to release tank pressure. Remove pressure test port cap on fuel rail. Place gauge end of fuel pressure gauge tool hose into approved gasoline container. Place shop towel under test port. Screw other end of gauge hose into test port to release pressure. Remove hose and install protective cap to fuel test port.
[02] -- Idle speed is adjusted with transmission in Neutral (N). When checking idle speed, set parking brake & block drive wheels.
[03] -- 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 end of this chart.
[06] -- Controlled by engine controller.
[08] -- Hydraulic lash adjusters.