Fuel Pressure Regulator and Gauge:
Not much to write on this, pretty much in and out, but I will cover a few pointers:
This is the old FPR, set to stock settings at 3 Bar:
You will have to take out the Fuel line from the Filter to the Fuel Rail, and the Fuel Line that returns to the Fuel Pump from the old FPR. Again a pointer is to use all new line. These lines are on pretty tight, infact I had to cut the lines that went to the Fuel Rail. Also since I was installing a Fuel Pressure Gauge as well, remember you will need more clamps than you had before, I had to go to the store and buy 2 more.
Once all the lines are off, and all the gas spilled everywhere and you weren’t smoking, you can disconnect the vacuum line on the old FPR and take off the (2) bolts that hold it in. I saved the old one for the heck of it. E B A Y!
For the Fuel Pressure gauge, your fittings may be quite large compared to the Line. In my case they were and I had to run hot water over the line for 10 minutes to get it soft enough to fit over the fittings.. Here is a PIC after I had them on, remember those new clamps? Well here is where I figured out that I didn’t have enough:
Also put some Teflon tape on the threads of the gauge to make a vacuum seal like this:
Now back to the FPR, pretty easy just use the (2) bolts to re attach in the old placement spot. Then connect the fuel lines back up to the filter, FPR, and Fuel rail. You’re done.
Make sure that if you do not have a good short-term memory, that you take a picture of the old lines to make sure you have them right.
Here is a final PIC
Setting the Fuel Pressure is a problem on this blacktop. With my accessories on I can set it at 58 PSI or 4 Bar, once I start the car and it cycles for a few seconds, it reads 3 bar. Weird. I am trouble shooting this now. Also my FPR when I pivot it I can hear a small vacuum leak if I move it hard enough. This shouldn’t happen so I went back to the dealer I bought it from and he is calling NISMO to see if the top twisting and releasing vacuum is a problem, then he will give me a new one,D U H…it’s a problem but I can wait since it doesn’t lose vacuum unless I force it..They also told me they have to ask NISMO if on a Turbo application setting the pressure has a deviation once the car is running…I know someone is going to say disconnect the vacuum line on the FPR when setting the pressure. Tried that too. Its goes back to 3 bar, well the gauge at least. But when I first start it, and when the accessories are only on, it reads what I set it at. Once the Pump primes I go back to 3 Bar. So I will not up the boost until I figure this out.