its a woodward fuel system with motorola controller has no voltage out to the crank sensor should it not have 5volt ref signal to sensor
My bet/WAG is a key switch or relay or wire failure, I did not know this truck came in a tier 2 (2004 or later) version. I don't think I have ever seen one of this serial number series that was tier 2. This makes it "a good day", as it is always "a good day" when I learn something new. ;-)
The fact it has no codes, to me, indicates no power from someplace where it is 'normal' for the power to stop, like the key switch, or wires and circuits from the key switch.
BUT, in tier 2, 4g6* powered trucks I have seen, they use a "sensor" wheel that bolts on to the crankshaft pulley and an externally mounted magnetic pickup sensor, and you don't get spark [or power to the coil] until the crank has made at least 1 complete turn (where the crank sensor sees the #1 cylinder mark/space on the wheel 2 times) so you may not get a spark inducing signal until/unless the crank sensor sees the gap it is looking for 2 times. The gap at the sensor is very critical and close tolerances, and the wheel must be "gapped" with a -nonmagnetic- [brass] feeler gauge, in 12,3,6, &9 o'clock positions to insure that the sensor does not see more than 1 spot per revolution that it thinks is the #1 cylinder gap. I think most/[?all?] emissions controlled trucks do not power up the coil until the crank sensor has seen at least 1 complete revolution.
What system is on this truck as far as the emission computer? (Impco spectrum?)
serial #c232L-1063-9592kf yes the rotor turns teir2 control truck has no codes /nospark/ecu has power/ground/ coil and vr sensor check ok has no voltage out to vr sensor from ecu should have 5 volt ref?? thinking ecu bad
does not this truck have a 4g63 or 4g64 motor?
what part are you referring to as "the computer"?
this is a pretty simple electronic ign. system, and not really "smart".
HOWEVER...
it does have a timing belt. is the rotor button turning?
?we will need correct serial number to answer correctly.