P0004 Code Fix?

**AFBLUE** · #1 (**permalink**) 04-25-2009, 08:23 PM

I am constantly throwing a P0004 Code on my truck with any tune I have been running on it. Its a "Fuel Volume Regulator Control Circuit High" What actually is this? Is it a fuel pressure switch in the head, and when I romp on it I drop fuel pressure momentarily?

It doesnt matter if I run on stock fuel pump with diesel or I am running on Veggie in my Veggiestroke which has a FASS pump, I still get this code.

**WEWILLE** · #2 (**permalink**) 04-27-2009, 05:39 PM

What are you reading that code with?

**AFBLUE** · #3 (**permalink**) 04-27-2009, 06:18 PM

Quote:

Originally Posted by WEWILLE

What are you reading that code with?

SCT X3 Tuner.

**Diesel Freak** · #4 (**permalink**) 04-27-2009, 06:22 PM

Hopefully if ya keep clearing the code it will give up.
I finally won clearing a similar code

**AFBLUE** · #5 (**permalink**) 04-27-2009, 08:03 PM

Yeah I am not sure what the deal is with it? The past week, I have been clearing it as soon as it comes up and its been out the longest as of right now, and I have been getting on it pretty good too.

I am just wondering what the P0004 code monitors? Is it a fuel pressure switch that I can put a small capacitor between 2 wires to stop a momentary voltage drop?

Mike Hickman · #6 (**permalink**) 04-27-2009, 08:24 PM

Dave just run it to our guy and have him run it with his computer at the dealer . Only code I keep getting after the work was done was the computer not detecting the EGR bs but thats was cleared with the sct.

**AFBLUE** · #7 (**permalink**) 04-27-2009, 08:29 PM

He checked it when it was in and he didnt have much to say about it. I am going to try a new tune here in a few days and will see if it keeps showing up, then I will go from there.