[V8] No Start

[george.fallot at verizon.net]

  Hi guys,
    Hope everyone had a nice Thanksgiving,I did until today.
The last time I used the 90V8 was Thursday morning. I went to 
use it late this afternoon and now it won't start.
     I tried to pull the codes and all I get is 4444. I have spark
at cylinders 1and 5 (the only ones I checked). I also have
gas, when I take off the return line at the presure regulator
and crank the engine I have gas.
     The engine sounds different when I crank it,almost like
the timing belt is broken. I took off the left timing cover and 
the belt is ok. I even cranked it until the timing marks that I 
put on the belt (when I changed it 6k ago) lined up.
     The car has 160k on it and I'm thinking that maybe the 
sensor that counts the flywheel teeth is bad.Neither of
the 2 sensors have been changed.Is there a way to check it?
    Anybody have any ideas?

 Thanks, George