Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 1984 >> EL Camino V8-305 5.0L >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Ignition Timing >> Adjustments >> Except Distributorless Ignition System (DIS)
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Except Distributorless Ignition System (DIS)


Set timing at slow idle and Before Top Dead Center, unless otherwise specified.

2.5L (151), ground diagnostic connector under dash. Average pulses of cylinders 1 & 4.

2.8L (173) FI, place system in bypass mode, disconnect tan/black wire by ECM in passenger compartment.

2.8L (173) 2V EST, disconnect 4-wire connector at distributor.

4.3L (262) FI, place system in bypass mode, disconnect tan/black wire at distributor.

All V8 W/FI, place system in bypass mode, disconnect tan/black wire inboard of bulkhead.

All others, disconnect & plug distributor vacuum hoses(s).





pro multis · About Operation CHARM