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Home >> Plymouth >> 1978 >> Horizon Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up Procedures - 4-Cylinder >> Ignition Timing

Ignition Timing

CAUTION: Timing light connections should be made using proper adapters. Do not puncture cables, boots or nipples with test probes.

Connect a timing light to No. 1 cylinder. With engine at normal operating temperature, adjust to curb idle RPM. Disconnect and plug vacuum hose at vacuum transducer. Check timing through access hole in clutch housing.

IGNITION TIMING SPECIFICATIONS

Application Degrees (BTDC)
All Models 15°