Ok I am having problems with my a/f on my wide band o2 I think my fuel pressure is off, what fuel pressure regulator works the best and easiest to install on the 5th gen?Has any one used the nismo ones?And what adapter do you use for the return side of the fuel rail?Any help would be appreciated.I posted about the same question a few weeks ago and i ordered one and it doesnt work right.Says i am running 100 psi and it wont adjust, so now a new try.Thanks

Jeremy

 

I like the AEM Unit. Seems to work well. Ive also heard good things about the SARD Unit as well. The FPR will only adjust fuel pressure at idle and as your passing through 0 vaccum as you go through the power band.

What are you using for fuel managment ??

-matt

 

EU all the way.i am about to get it tune I just have to figure out my fuel pressure issue.My a/f bounces every where at idle and slow acceleration.

 

Are you sure you have the FRP connected properly. I had mine reversed the first time and it showed some Weird readings.

It suppose to....anywhere from 14.5-15.3ish is ok....while cruizing the same thing. Youll only really know your "real" A/F is when you go WOT. And then the only real way to see is to start logging onto a laptop

I should be getting emanage ultimate when it gets a bit warmer out.

 

yeah mine is bouncing around from like 15.3 to 16.8 so it is a little more lean than that, I also have 550cc injectors.So I am trying to figure this out quick I want to tune soon,damn i am a poet, lol.

 

I had the AEM before I switched to the Vortech SFMU. I have nothing bad to say about either.

 

Stock one.

 

i have the sard, with a defi gauge hooked up to it, seems to be working perfectly.

 

accufab afpr. I have no complains, it does it's job.

 

Don't worry too much about your AFR at idle and cruising. It will constantly bouch around, that is what it is supposed to do. you can idle at a 20:1 AFR, it won't hurt anything

 

The only thing is that it does it at a mild throttle too and you can feel the car,feels like it has a fuel issue.You can watch the a/f on the wide band bounce and feel the car surge at an easy throttle but when you go wot it richens up and acts fine.So I was think my fuel pressure might be off.

 

Used the Paxton FPR with no problems, and its up for sale now.

 

Anyone have any pics of the install on their fpr?The adapter I bought looks like it only works on feed not the return.Does anyone have a write up on intall?

 

im using a Areomotive and love it. Works well!