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  1. A

    Ign timing 1996 5.7 L

    I have a 1996 Manta Ray with the Merc 5.7 set up. I need to know how to set the timing. I have the distributor with the module mouted on it. I beleve that it the thunderbolt IV. I was told I needed to ground out the distributor to set base timing(purple/white wire) I do not have a knock...
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