Have you tried backing out the screw on the fuel pressure regulator (Hex on the top with a lock nut)? I would try that since the Fuel Pressure is high all the time now.

 

I have reset the regulator 2 times, and still have the issue. I am pretty sure that the regulator is bad, so I have one being shipped to me. I hope this will fix the issue.

 

Brian- Tried emailing you but it came back undeliverable. Can you pm me your email?

 

The issue with my fuel pressure is still not fixed. Last night we pulled the return lines and blew air through them and there were no blocks in the lines. We have put a new regulator on, and the issue is still there. When we start the car the fuel pressure is at 2.9 and holds for about 10 seconds and then jumps to 4 bar and stays. The only thing that we have not changed in the whole system is the filter bag on the bottom of the fuel pump. If the fuel filter to the pump is clogged can this cause all the issues that I am having? I am running out of ideas on this.

Any thought would be great.

 

does the fuel pressure fluctuate with the throttle inputs. like higher fuel pressure at low vaccum or boost and low fuel pressure at idle?

 

the pressure jumps from 2.9 to 4 with the vaccum line on and off. the fuel pressure does fluctuate with the throttle at 2.9 and at 4.

 

mechanical or electronic fuel pres. gauge?if it is electric, try running a mechanical gauge off the pressure port.

 

the gauge in the car is a elctronic Defi gauge, we also hooked up a mechanical gauge and they both did the same thing. we thought it might be the gauge at first, but when it jumps to 4 the car starts to run rough.

 

was the fuel pump mods done correctly? meaning the regulator block piece? running out of ideas for ya here man. it is a pretty simple system.

 

I sent you an email. Try the fixes I mentioned.