The drivers side GP feed, fat orange wire, goes to the drivers side glow plugs.
Near where it exits the main loom to the glow plugs there will be a splice and another fat orange wire that runs to the fuse box.
Cut the fat orange wire that runs to the fuse box just past the splice and remove the...
There are no fuses, relays, or switches between the ign. sw. and the starter on a 94 burb.
Check the CRANK fuse for voltage when cranking. It does not feed the starter, but does signal
the LP relay. Could be the firewall connector or even a fried sol. wire near the starter.
The security lamp is turned on by the PCM grounding the security lamp.
The PCM must get the correct code from the EVO/PASSLOCK module or
the PCM will ground the lamp and kill the injectors.
Have you tried running it with the CPS disconnected and then again with the OPS disconnected
to see if there is any difference in how it runs?
I doubt the injectors are the problem or the IP since both IP's do the same thing.
Probably electrical or even timing gear off.
You could try removing...