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.
1982 Pontiac 6000 L4-151 2.5LFACTORY OEM SERVICE PROCEDURE
Ignition Timing: Adjustments
Set timing at slow idle and Before Top Dead Center, unless otherwise specified.
Disconnect and plug distributor vacuum hose at distributor.
1.8L (112) FI, 2.0L (122) OHC, 2.5L (151) FI, 3.8L (229), ground diagnostic test terminal under dash.
Others, carburetted, 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.
Disconnect and plug distributor vacuum hose at distributor.
1.8L (112) FI, 2.0L (122) OHC, 2.5L (151) FI, 3.8L (229), ground diagnostic test terminal under dash.
Others, carburetted, 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.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.