I just found today that I lost my second pressure regulator in 1 year. Has anyone else had a problem with these? Anyone replaced them with aftermarket? Better or not worth it? Tired of spending $115 on junk!!

 

what is your car doing that you think the fpr is dying

 

Checked it, its dead. Running at 52lb. Getting about 15mpg. No power. Fuel not returning to tank. No pressure in tank.

 

that's f***ed up..
something is killing the regulators. I've only seen a small few fail before. maybe it's cheap Idaho gas

anyway, there IS a root cause to this.. you need to figure out what it is and fix it..

 

first one was dead when I got car, second died when I put it back in. I had the whole motor out,and tore down. When I put it all back the reg went out after 60 miles.

 

you got a fuel filter in there?

how's the return lines? make sure they're free-flowing and don't have any blockage.

when you pull the regulator, is there stuff stuck in it?
they usually don't just fail like that... I'm guessing you've got a bent/plugged return line somewhere.

 

Nope, Thats all been checked out too. No blockages. Even took off reg and turned on pump. Can you say hurl. Had reg on bench, put vac to it and tried to blow through it. No Go! Just doesn't move anymore.

 

You want a new Nissan OEM FPR? I'll give it to you $50 shipped! Brand new, never used. I bought it then realized I didn't need it, my loss your gain.

 

When you say "that's all been checked" are you refering to checking for blockage downstream from the regulator. For me, you are the first I've read with numerous fuel regulator problem. I'm also leaning towards some sort blockage down stream of the regulator. Pulling the regualtor and turning on the pump doesn't tell you what's happening after the regualtor.

You stated you're getting 52psi. I assume you had a inline gauge installed and the reading was taking at idle, correct? What happens when you're at idle and you remove the vacuum line from the regulator, does the psi change?

More details

MIKE

 

All lines are clear. The only resistance in return lline is that of fuel at other end of lilne. It makes no difference whether it hooked to vac or not. Yes I have good vac too. Turning on pump was just to make sure there is nothing in the rail.

 

Something is blocking the fuel and raising the pressure too much. A normal regulator will keep the pressure at 36psi(ie.. with vacuum). With the ign off or wot, the pressure should only be 43psi max(ie.. no vacuum signal). You said your is 52psi? Unless you have an aftermarket fuel pump that's running at a higher psi value, you have a blockage somewhere. Probably inbetween where the fuel outlets from the rail and back into the tank. It's easiest to take off the rubber line and take a quick check

 

Okay, THERE IS NOTHING BLOCKING A SINGLE LINE. ALL LINES ARE CLEAR. THE REGULATOR IS DEAD.

The diaphram in the regulator is weak. It won't let anything less than 42lbs pass. At an idle it should be between 32-36lb. It is at 42@idle when given gas it climbs right up to 52. Its just worn out.

I already know what is wrong with it. All I wanted to know was did anyone have an aftermarket adjustable one. Wether or not they liked it, and if anyone else had this problem.

 

I use Aeromotive fuel pressure regulators on my vehicles. they are a bit pricey (but not by mutch) and the quality is just top notch. You will need to block off your return line out of the stock regulator and put the regulator after the fuel pump. One line will go from the filter to the side of the regulator, and another from the opposite side of the regulator to the fuel rails, and the return line will be plugged into the bottom of the new regulator. The vacuum hose should be about the same size, so you should have no trouble hooking that up. You will need a pressure gauge either permanently mounted to the gauge port that comes on the regulator or a temporary one to set the pressure initialy.

Pick one up at www.summitracing.com of www.jegs.com They go for a bit over 100 bux and you will only need a 2 port vacuum referenced one but you probably will only find a 4 port. Just get some 3/8 pipe plugs to block the extra ports off and 3/8npt to barb for your stock lines. The pressure gauge port is 1/8npt.

 

I found one on Ebay the other for about $125. It had a guage built in and all adapters. Didn't look bad all anadized blue and everthing. Can't remember the name of it though.

 

If it was blue, it was more than likely a Paxton peice. I am an authorized dealer for paxton, they run about 125 new without the gauge.

 

My Max starts fine when cold and fine when hot. If it sits for an hour or two after running, it won't start, it cranks over and over and after a few minutes it eventually starts then it's fine. My fuel pump is running, I can hear it when I turn the key, could this be my fuel pressure regulator? Would it prevent the car from starting like I mentioned?
Thanks boys
Jeff

 

Is there fuel pressure before you try to start the car?
It is not unusual for a vehicle to lose pressure while sitting just menas that something needs to be replaced.
Usually fuel ines or fuel pump.
Fuel pump being more common.