Cranks, no start, many codes
 

Hey I'm new to Saabs, someone hired me for diagnosis. I'm usually a diesel guy (trucks and vw/merc). Here's what I got-

Saab 93- cranks but doesn't fire up

Codes-
P1135
P1141
P0125
P1614
P1312
P1334

Two of the codes are for fuel air metering and two are for ig system misfire.

I can hear the fuel pump start for about 5-10 seconds and stop when the key is turned.

Where to start? From my research the possible culprits are oxygen sensor wiring (both sensors are brand new), the ignition cassette, or maybe a fuel pump check valve. Any suggestions on what to test first and how to test it?

Thanks!