Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1992VALUE VAN 4.3 Z, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSIGNITION SYSTEMIGNITION TIMING
1992 GMC Value Van 4.3 Z, Automatic
Ignition Timing
1992 GMC Value Van 4.3 Z, AutomaticSECTION Ignition Timing
NOTE:
For timing adjustment procedures, see ADJUSTMENTS
article in the ENGINE PERFORMANCE Section.
IGNITION TIMING (Degrees BTDC @ RPM)
| Application | (1) Man. Trans. | (2) Auto. Trans. | ||||||
|---|---|---|---|---|---|---|---|---|
| 2.5L (VIN E) | 8 @ Idle | 8 @ Idle | ||||||
| 2.8L (VIN R) | 10 @ Idle | 10 @ Idle | ||||||
| 3.1L (VIN D) | 10 @ Idle | 10 @ Idle | ||||||
| 3.8L (VIN L) | (3) | (3) | ||||||
| 4.3L (VIN W & Z) | 0 @ Idle | 0 @ Idle | ||||||
| 5.0L (VIN H) | 0 @ Idle | 0 @ Idle | ||||||
| 5.7L (VIN K) | 0 @ Idle | 0 @ Idle | ||||||
| 7.4L (VIN N) | 4 @ Idle | 4 @ Idle | ||||||
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.