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 MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESNO START TESTINSPECTION OF IGNITION TIMING CONTROL SYSTEM
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
Inspection of Ignition Timing Control System
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION Inspection of Ignition Timing Control System
Fig. 13 Ignition timing control terminal:
1. If altitude is lower than 3900 ft. above sea level, check ignition timing with battery voltage applied to ignition timing adjusting terminal and when battery voltage is not applied, Fig. 13. With battery voltage applied, ignition timing at idle should indicate 10° BTDC. With battery voltage applied, timing should be 5° advanced or 15° BTDC.
2. If altitude is higher than 3900 ft. above sea level, check ignition timing when adjusting terminal is grounded, then recheck when terminal is not grounded. When not grounded, ignition timing should be 15° BTDC at idle and when grounded, ignition timing should be retarded by 5° at 10° BTDC.
3. If timing is not as specified, replace ESC igniter.
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.