98 dodge neon no fire no fuel. Have .8v on v supply to ckp and cmp

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Couple things I have done replaced crank and cam sensors have swapped pcms have tested wiring to all three sensors at pcm its same as at sensors .8v when its susposed to read 7v to 8v. also when I check the b+ on the ign coil there is nothing. ko no fuel pump noise and fuel pump also has .8v the power supply to pcm is good and it is grounded as well as ckp cmp and vss lost and don't know where to go now. trying to save 100 dollars from the dealer. I would like a detailed description of the asd relay and how it works what makes it work. I believe that it my next step to try to get the car to start. any suggestions are open wish it was an easy fix like just replacing the ckp but its like diagnosing eboli.