Question about 1989 GMC K1500

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Where can i get the specs for ignition timing on a 1989 GMC K1500 Pickup

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  • sweetbutnots Nov 24, 2009

    8 cylinder. 5.0L

  • sweetbutnots Nov 24, 2009

    I looked on the emissions label under the hood, but it's worn. I need to know what the specs are for the ignition timing.

    Thanks!

  • sweetbutnots Nov 24, 2009

    Thanks so much! I'll give it a go and see what happens! :D

  • Marvin
    Marvin May 11, 2010

    need to know what egine

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Note: The Timing Connector breaks out of the engine wiring harness conduit adjacent to the distributer. It is a single wire sealed connector that has a tan with black stripe lead.
Note: Timing specifications are listed on the Vehicle Emissions Control Information label under the hood. Always follow the Vehicle Emissions Control Information label procedures first before using the following procedure. 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 the harness close to the distributor. DO NOT disconnect the 4 wire connector at the distributor.
  • Connect timing light and adjust as necessary by loosening hold down bolt and rotating distributor.
Base Timing, with Manual and Automatic Transmissions: 00(TDC)
  • Tighten hold down and recheck the timing.
  • Stop the engine and connect SET TIMING connector.
  • Clear ECM trouble code by disconnecting ECM power source.
Where can i get the specs for ignition timing on a - c83ddf4.gif

Posted on Nov 24, 2009

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I have always set to zero, but heres how, on the passengers side top of firewall ,there is the electrical junction cover ,under the hood. look for the tan and black wire in the big harness some times around the back of the engine, look for the connector in the tan and black wire and disconnect it..start the engine check timing and set to zero, with the timing light. when this is done reconnect the tan and black wire connector and yer done , this wire eliminates the advance and computer adjustments so timing can be set .. yes the engine light will be on and it will show code 42 est bypass fail but this is normal.. light will go out when the connector is reconnected hope this answers your question..good luck,

Posted on Nov 24, 2009

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Autozone.com free vehicle repair guides

Posted on Nov 24, 2009

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