What did you do to the car before this started happening? Did this just start up out of the blue?
I would check the timing again, are you sure the guy you went to knew what he was doing? Have you pulled the distributor lately, you might have put it back in wrong. Check the TFI module on the distributor, I know there was a problem with them that Ford had a recall on. Have you checked all the ignition connections and ground to be sure it's all tight?
Have you checked the fuel filter? What's your fuel pressure at?
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