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HOMESERVICE MANUALSFORD1991CUTAWAY 5.8 H, C6REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGIDLE SPEED & IGNITION TIMINGBASE IGNITION TIMING
1991 Ford Cutaway 5.8 H, C6

Base Ignition Timing

1991 Ford Cutaway 5.8 H, C6SECTION Base Ignition Timing
NOTE: Base Ignition timing on the 2.3L models is not adjustable.

Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see ADJUSTMENTS article in the ENGINE PERFORMANCE Section. Ensure all accessories are off and transmission is in Park or Neutral. Set parking brake. Disconnect automatic parking brake release (if equipped). Ensure vehicle front wheels are in straight-ahead position and curb idle speed set to specification.

NOTE: Ignition timing is not adjustable on models with DIS or EDIS.
6-CYLINDER BASE IGNITION TIMING

Application (1) Degrees BTDC @ RPM
4.9L 10 @ (1)
(1) Information not available from manufacturer. Use Scan tool to set idle.
V6 BASE IGNITION TIMING

Application (1) Degrees BTDC @ RPM
2.9L
Automatic Transmission 10 @ 800
Manual Transmission 10 @ 850
3.0L 10 @ (2)
4.0L Timing not adjustable.
(1) With SPOUT in-line connector disconnected.
(2) Idle speed is not adjustable.
V8 BASE IGNITION TIMING

Application (1) Degrees BTDC @ RPM
5.0L
Automatic Transmission 10 @ 525-825
Manual Transmission 10 @ 550-850
5.8L
C6 Automatic Transmission 10 @ 630-930
E4OD Automatic Transmission 10 @ 580-880
Manual Transmission 10 @ 580-880
7.5L 10 @ 500-800
(1) With SPOUT in-line connector disconnected.
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
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