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Thread: 87 2.8L ignition timing

  1. #1
    Join Date
    Sep 2007
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    87 2.8L ignition timing

    I have an 87 Chevy S10 blazer with the 2.8L engine I want to check the timing on her but the under hood sticker is gone & all the manuals I have say to refer to this!. So my question is could someone tell me what the correct timing is on this & also anything that I need to unplug?. Thank you!

  2. #2
    Join Date
    Sep 2007
    Location
    Orlando, FL
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    Re: 87 2.8L ignition timing

    I know that you have to put the truck in base timing mode for my 93' but I have a EST or HEI style ignition. If you have the electronic distributor then find the grey wire with a plug on the end of it next to the A/C box on the left side under the hood near the firewall. It will be hanging out of the wire harness. Apply 12 volts to it from your battery with a jumper wire and the truck will go into base timing mode. then line up the marks on your balancer. take the jumper wire out and your set.

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