Re-learn resistance in Passlock II

I am not trying to install a remote starter, but I have a truck that will not allow the injector to pulse to start the vehicle.

Is there any way to re-learn the resistance value from the ignition cylinder on this system?

for the passlock system to re-learn the resistance.Turn the key on on and let it sit for 10 min.

It is a 1999 Chevy Full-Size Van.  We have been trying to diagnose why this thing won't start for two weeks.  We initially had low fuel pressure, so we changed out the fuel pump.  We have spark and fuel pressure now, but the thing acts as though the Passlock II security is not allowing the injectors to fire.  The thing will start each time, but for only a second or two, then dies.  The only thing NOT pointing to the Passlock II system being the culprit is that the security light is not on constant in the dash like I've seen before on cars that I've installed remote starters on.

I am ready to burn this thing up I am so frustrated.  We have done numerous computer scans and such, to no avail.  My shop is losing a lot of dollars on this job, 'cause it's taking up a bay and labor time and not getting fixed.  If anyone has any idea on what to try next, please let me know.

Yes, we do have noid lights to test the injectors.  The only problem with that on this van is that the injector wires run a bit differently than your typical car.  All of the injector wires run through this central distribution system that does not enable us to test the firing right at the injector, like normal.

The problem has to be with the injectors not firing.  If we fog the intake air with carburator cleaner while cranking, the engine will run.  We also checked the operation of the crankshaft position sensor, which also controls the firing of the injectors, and we tested the mass airflow sensor.  Both of those sensors are functioning properly. 

This customer tried using starting fluid on this van when the thing first failed on him.  He had a small fire near the air cleaner box, which charred some wiring, but we can see all these wires, and it seems that the only damage with to wire insulation.  I can't see any copper, or broken wires.  I am beginning to wonder if any wiring from the BCM run up in that area.  Perhaps we have a Passlock problem, but the light is working normally.

I am at a loss on this one.  The customer is getting anxious, and I need to get this thing out of my shop.  If anyone has any ideas on this, I would appreciate it.

check all outputs from the lock cylinder to make sure you have output. Then double check no blown fuses or fuseable links.

Is the PCM corroded and expanding? We had one that was all corroded inside and the casing was starting to expand on it.

I will check that out next, thanks.

There is an aftermarket alarm on this thing.  The starter works fine, but is there any aftermarket alarms that could cause the injectors be dead like the Passlock system would do?  I have experience with remote-starters, but do not live in an area where we need alarm systems, so have no experience with them.

aftermarket disable systems tie into either fuel or passlock wires. Usually you see something attached under the dash. It is those annoying things where you try key on and wait till it chirps and then start it.

so check that also. Disconnect anything that is interupting the factory security wires.

I gave this one some time this weekend.  This thing did have a remote starter installed with the aftermarket alarm.  The owner of the vehicle claims that it was installed by the dealer where he purchased the van.  If it wasn't so far away, I would suggest that he tow the thing back there.  It is one of the worst quality install jobs that I have ever seen, with twisted together wires, etc.

I disconnected all wires from the passlock wiring, and connected it back to factory.  I still did not get the van to start.  I did try and start the thing without the yellow data connected to the BCM, and got a different reaction from the security light.

I did look into the fuel pressure issue, and have already replaced the pump in the tank.  At first, that was our only issue, getting only 20 psi of fuel at the injectors.  Now that's not a problem, and we still can't get the injectors to fire.  I am starting to think that it's a bad BCM.  Any other suggestions would be appreciated.