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Recheck your wiring since you did the conversion recently. Check your grounds and make sure ECU base has bare metal to metal contact. I had a similiar problem and the previous owner had the 4 connector ballast wires swapped between the 5 ohm and 1.5 ohm sides. Mine would sometimes fire up...

Get a good ohm meter and ohm them out to see if they still show good low resistance. If so probably no reason to change them unless you're like most of us who can't go longer than a month without tinkering. :yawinkle: I use a custom set of Crane 8.5mm Firewires. They had an online closeout...