Starting on 1992 Volvo 740

1992 Volvo 740 will not start. Regina engine.
new coil, coil wire, plugs, plug wires.
Will start with ether.

2 answers
Several possibilities: http://repairpal.com/volvo-740-1990/common_problems
Check DTC's, You may find a 2-1-4 code for the RPM Sensor. Replace it if you do.
Here is how you check the codeCode descriptions: s: http://volvospeed.com/CheckEngine.php
Code Descriptions: http://volvospeed.com/vs_forum/index.php/topic/47502-dtc-information/
check relay under hood, mounted on overflow tank.
Switch wires to aux relay, next to it.