[BimmerBoy]

So I dove into trying to fix this problem today. I placed the jumper to TST as well as put in a freshly cleaned jet, then I let it run for 30 seconds and the gauged showed full bars, where as before it showed only 2 bars.

"Great its fixed" I thought, so I put everything back together and went for a test drive, and then nothing. After a fair bit of cursing, I took everything back apart again, put the jumper back to TST and turned the system on...... this time NOTHING AT ALL, no flow on gauge, the pump didnt turn on, nada.

Now i was livid, it turned on before, now nothing. "It must be the pump" I thought, So I went to the tank took that thing apart to gain access to the pump, and tested the pump directly, and it turned on............

So i went to the gauge and started messing with the settings, turning the the dials back and forth to see if I can get something to turn on. Nothing I did worked. Now I turned from incredibly angry to wanting to just quitting and bringing it in to a shop.

So I started putting things back away, and the jumper was still on TST, as I was putting everything back in, I heard the pump turn on, "SWEET!!!!!!"I proceeded to take everything back apart so I can place the jumper back to PRK and then the pump turned off.

With the control box in my hand and noticed that if I would hold it at a certain angle that the pump with turn on, but if I held it at a different angle it would turn off. After a bunch of trial and error I finally traced it to the red colored plug. I ended up securing the control box at an angle where the wires would make contact and went for a test drive. And SUCCESS now everything is working as expected. I will need to get a new replacement but im glad I was able to figure it out.


TL/DR: Red "Engine Bay" cable (or FCM cable) has a break in one of the wires preventing the pump/FCM to turn on when its suppose to.


Well ideally this helps someone in a similar situation, but i think my problem maybe a one off.