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.
1990 Plymouth Voyager LE, 2.5 J, Automatic, A604FACTORY OEM SERVICE PROCEDURE
Electronic Spark Advance Check
NOTE:
Always refer to Emissions Control Label in engine compartment before attempting servicing. If manual and label differ, always use emission label specifications.
ELECTRONIC SPARK ADVANCE (Degrees BTDC @ RPM)
| Application | Manual Transmission | Automatic Transmission | |||
|---|---|---|---|---|---|
| 2.5L Non-Turbo | 17-25 @ 2000 | 17-25 @ 2000 | |||
| 2.5L Turbo | 21-29 @ 2000 | 26-34 @ 2000 | |||
| 3.0L | N/A | 34-42 @ 2000 | |||
| 3.3L (1) | |||||
| Federal | N/A | 24-32 @ 2000 | |||
| California | N/A | 33-41 @ 2000 | |||
| 3.9L, 5.2L & 5.9L | N/A | N/A | |||
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Factory Service Tools
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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.
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