Hi Dave,

I worked with Steve on the phone earlier and found
from his VIN nr. he has a 1991 B230FB (Using Volvo pocket data booklet)
he has two CPS that both coils resistance check OK
Volvo has one CPS -1991 and another 1991-
slightly different resistance and impedance values
He thinks the engine is in Time #1 at TDC and timing marks OK AND rotor at #1 plug.

My 740 manual is for 89 and the DI unit may be different in his 91
the Volvo pocket book says measure primary at 1 and 15 and secondary 1- to High
and the drawing and parts he has don't show pin numbers
looking up his DI part nr. 1346788 you can find just the coil for about $25
and it looks like he has an open port from where the "- coil" pin plugs in to the
DI unit where the chassis connector goes.

What craps out in the DI unit that the coil connection is lost?
The coil primary and secondary windings seem OK
are there any series components in the DI unit from coil to chassis connector?
Do you have wiring info for the 1991 B230FB Rex Ignition?

Thanks, Bill