Idle Speed & Ignition Timing

For adjustment procedures, see appropriate ADJUSTMENTS article in the ENGINE PERFORMANCE Section.

IDLE SPEED SPECIFICATIONS ⁽¹⁾

Application

Idle RPM

Amigo & Pickup 2.6L ⁽²⁾⁽³⁾⁽⁴⁾

900

Rodeo

2.6L

900

3.1L

800

Trooper ⁽⁵⁾

750

⁽¹⁾	If specification varies from underhood Vehicle Emission Label, use specification from label.

⁽²⁾	Transmission or transaxle in Park or Neutral.

⁽³⁾	Disconnect fuel pressure regulator Vacuum Switching Valve (VSV). Disconnect and plug canister purge and EGR vacuum lines.

⁽⁴⁾	On California models, disconnect and plug vacuum line for EGR vacuum switching valve.

⁽⁵⁾	Idle speed controlled by ECM and is not adjustable.

IGNITION TIMING (Degrees BTDC @ RPM) ⁽¹⁾

Application

Base Timing

Amigo, Pickup & Rodeo

2.6L

12 @ 900

3.1L

10 @ 800

Trooper

5 @ 750

⁽¹⁾	With jumper wire installed in ALDL connector, located behind right side of instrument panel. Increase engine speed to 1500-2000 RPM to read timing specification (if necessary).