Hello everyone, I have been diagnosing this vehicle for a much longer time than I’ve liked. The original problem with this vehicle started on my way to work when it started to act as if it was trying to stall itself every couple seconds. My first thought was a failing crankshaft position sensor so I replaced it the night of and the problem remained the same. The next day the car would not start at all so I got it pulled into a shop. Prior to this problem I have had the Ignition Control Module and coil packs replaced with brand new ones. After looking through some articles on identifix I found that it could be worn wires next to the valve cover so after replacing a few the car started and ran for a few seconds. But no luck after that. At this point the main problem seemed to be that I wasn’t getting spark and I’ve gone through many parts and countless hours trying to figure this out. So far I’ve replaced the crankshaft position sensor, Camshaft position sensor, the timing chain itself since I had one and I eliminated the possibility that the timing jumped. I have also replaced the the PCM. I’ve checked for power and ground and continuity in all circuits that could possibly relate to starting the car and they have all checked out good.
Recently I ran into a problem with the fuse box and after replacing that I have regained spark and the car really wants to start up but it will not. It backfires and the PCM will not send power to the fuel pump relay for some reason so I am having to jump the terminals to power the pump to get the car to try and start. Anyone know why the PCM won’t send power to the fuel pump at all?
If anyone has any ideas they’d like to share please do. The next thing I’m going to look at is if the crankshaft key way has been damaged or shifted since I’ve removed the harmonic balancer a number of times.

Sounds like it'* out of time. You need to verify things like what you actually tested of the starting circuits. What did you get at the ICM? How did you test it?

What is the fuel pressure?

I get battery voltage at the ICM and I get crank and cam voltage when cranking but I don’t have a scan tool to tell wether or not the signals from the crank and cam sensors are uniform.
When I apply power to the fuel pump it’* around 50-60 psi. But the PCM won’t send power to it on its own.

I test everything with a multimeter with the key on or cranking and I backprobe the wires at the ICM connection.

Here’* a wire diagram of the ICM if it helps.

Did you check at the plug to see if you had spark. Should be at least 20Kv.
We need to verify the engine is in time. What is fuel pressure? Spark? Will it run on alternate fuel? We need to narrow this down with testing.

When I get back home I’ll double check for spark at the plugs but I’m certain there is. The ICM, coils, spark plug wires and spark plugs are all new. When I give power to the fuel pump the pressure stays around 55 psi. When I spray starting fluid while cranking it will backfire quite a bit but it never starts.

That sounds like timing. You can tell if it'* off without pulling the cover. I would verify that first.

Alright so I got back home and I checked for spark at the plug and there is spark. So with that I’m leaning towards the fuel side of things. For some reason there isn’t any backfires and it sounds like it just needs fuel, so I decided to use a toggle switch at the fuel pump relay to constantly give the fuel pump power. (With Fuel pump on it reads 60 psi) My car actually started and ran with the fuel pump staying on. Which was weird considering that I’ve tried this already before.
Just a side note, the battery has been disconnected for three or four days prior to me messing with this.
So now that I know the only problem is getting the fuel pump to turn on what do you think I should look at next?
I know that the PCM isn’t sending power to the fuel pump through the dark green/white wire. I’ve verified this by probing that wire at the PCM and checking for voltage with key on and cranking. I also checked continuity from the connector at the pcm and the terminal where the relay goes and there is zero resistance.
This is a new pcm and I’ve already swapped the old one to make sure it wasn’t the pcm itself.

So it runs good when it runs? The relay for the pump may need replacing. Swap it with one of the others and see it the pump stays running.