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  1. L

    NO SPARK!!!! Thunderbolt IV headscratcher

    Also ran a new ground wire, 8 gauge from the neg post on the battery to the to the ground on the manifold riser where the module is screwed to. No change
  2. L

    NO SPARK!!!! Thunderbolt IV headscratcher

    I have gone through the trouble shooting guide multiple times with no luck, it keeps referring me to the distributor ignition sensor, I replaced it with an aftermarket one, same result. I ordered another one and still same result. I can’t get OEM where I am so I just ordered one from Amazon. Is...
  3. L

    NO SPARK!!!! Thunderbolt IV headscratcher

    I have a 1994 302, merc 5.0L with thunderbolt IV ignition. -I have 12 V at the + on the coil -I have 12 V at the red and white wire behind the distributor. -I have disconnected the gray tac wire -I have disconnected the green/white wire from the shift Int switch -I have a gap light at the...
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