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 MANUALSCHEVROLET1982CITATION L4-151 2.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGADJUSTMENTSIGNITION TIMING ADJUSTMENT
1982 Chevrolet Citation L4-151 2.5L
Ignition Timing Adjustment
1982 Chevrolet Citation L4-151 2.5LSECTION Ignition Timing Adjustment
Set timing at low idle and Before Top Dead Center, unless otherwise specified. Disconnect and plug distributor vacuum hose at distributor on vehicles without computer control.
2.5L (151) & 3.8L (229) engines, ground diagnostic connector.
2.0L (122) FI, 2.8L (173) FI, 5.7L (350) FI, 5.0L (305) CFI engines, disconnect bypass connector (tan/black wire).
All others W/carburetor, disconnect 4-wire connector at distributor.
Timing MUST be set to specifications on emission label, if different from setting listed. If "Check Engine" light comes on during procedure, remove ECM fuse to clear.
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.