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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: samseye on June 02, 2006, 08:07:00 am

Title: 454 Timing?
Post by: samseye on June 02, 2006, 08:07:00 am

Anyone know what the timing should be set at on an 88 454?

Title: Timing
Post by: VileZambonie on June 02, 2006, 07:21:00 am

4° BTDC

PROCEDURE:

Set timing under the following conditions:



Normal operating temperature.
Air cleaner installed.
A/C "OFF".
Transmission in neutral.
Disconnect SET TIMING connector (tan/black wire) located in harness. DO NOT disconnect 4 wire connector at distributor.
Connect timing light and adjust as necessary by loosening hold down bolt and rotating distributor.  Tighten hold down and recheck the timing. Stop the engine and connect SET TIMING connector. Clear ECM trouble code by disconnecting ECM power source.

NOTE: Dual timing scribes are on the 4.3L engine balancers. They line up with the timing indicators at one o'clock and four o'clock positions. Use the one o'clock position.