Fitted An Adjustable Fpr And No Good. Help Please.

[WogsRus]

HI all

Well i had time today so i went ahead and fitted my new FLYEN FPR and well that was the easy art, no big deal there.

So i primed to lines, no leaks, BONUS.

Started the car, good, everything runs ok.

As the car ideled i turned the seting up to 40psi, and all still good, no leaks ext.

So went for a drive annnnnnndddd

NO BLODY GOOD MATE. The car simply runs out of puff.

So went home, all lines still good, ok what is going on. SO i ran the car, got the motor to 6000 rpm and the fule pressure drops off. NOw this was under no load, so not sure what is going on. Is it not suppose to insrease with boost pressure. I know it had no load, but hay.

So how do i fix this?

What pressure should i be running? and has anyone got one of these installed? ARE they any good or did i get ripped off?

Also, can somone post a pic of their installation, and maybe a DIY just to double check mine.

THANKS

HELPPPPPPPPP

Edited August 29, 2006 by WogsRus

[Adriano]

If you hold the motor at a steady state rpm at 6000, the fuel pressure should be about 36psi if it is set to 40 at idle. As you blip the throttle, the fuel pressure should go up and down.

[WogsRus]

it does go up and down, but it moves more then 4psi, it propably dropps of to about 30psi, not sure. I will install it again once i have more infor. For now the setup is all inplace, i just reinstalled the stock system, and swithed the lines over.

[Color_Of_Green]

What fuel pump do you have?

[AzzurrA]

yeah... was gonna say, what fuel pump are you running?

it could be that the pump is about to shit itself and requires replacing

[WogsRus]

hi, yeah i still have the stock pump, but the weird thing is the car runs fine with stock FPR no probs, no splutters, starts fine ect.

I am not sure if the reg may be faulty, or what. The only other things is the way the new REG line connects to the fuel rail, it has a bolt on adaptor plate, with an O ring seal, but it seams ok.

One question. Near the fuel filter on the return side, there is some funny check valve or something, what does that do?

So can somone post some pics of their setup to compare my FPR setup.

Thanks.

PS. What psi do the stock pumps handel, and what flow?

[Abo Bob]

Check your vacuum line for leaks. Sounds like the vacuum isn't increasing the pressure as it should.

[BezerkR32]

Why did you fit the reg if there was nothing wrong with car before hand?

HI all

Well i had time today so i went ahead and fitted my new FLYEN FPR and well that was the easy art, no big deal there.

So i primed to lines, no leaks, BONUS.

Started the car, good, everything runs ok.

As the car ideled i turned the seting up to 40psi, and all still good, no leaks ext.

So went for a drive annnnnnndddd

NO BLODY GOOD MATE. The car simply runs out of puff.

So went home, all lines still good, ok what is going on. SO i ran the car, got the motor to 6000 rpm and the fule pressure drops off. NOw this was under no load, so not sure what is going on. Is it not suppose to insrease with boost pressure. I know it had no load, but hay.

So how do i fix this?

What pressure should i be running? and has anyone got one of these installed? ARE they any good or did i get ripped off?

Also, can somone post a pic of their installation, and maybe a DIY just to double check mine.

THANKS

HELPPPPPPPPP

[WogsRus]

well basically, i had about 4k worth of parts sitting on the floor of my garage for about 6 months, as i had no car then, just the parts.

Now i have the car, i am slowly puting things in.

I fitted the FPR as i am installing my SAFC II this week, and once the FMIC is on, i am going to run 12 psi. Seing as most skylines hit RR about then, i am going to trick the computer by leaning out the map on the SAFC II and then bumping the fuel pressure back up to make sure it still has correct flow.

I cheacked for vac leacs, and all seams ok, the fuel pressure decreases with vacume ect.

I am thinkg that maybe it's not a 1:1 FPR and hence once on boost it runs toooo ritch. Not sure.

Maybe i go and get a nismo one and bolt that up instead.

ONE MORE THING, does it matter if the reg is not horizontal but vertical, can that couse any problems. ie. the inlet is 90 down and the outlet is horizontal.

[WogsRus]

ALSO does anyone know weather or not the fuel reg need to be mounted up and down or can it be mouted horizontaly.

[Guest 40th-edition]

it shouldnt matter which way it is mounted.

sound like vacuum line to me as well, thats what controls the pressure boost..

other wise check out the pump and pressure valve

[WogsRus]

pressure valve?

which one, the tank bypas one. Well i think i might get a new pump anyway, but i don't understand why the stock reg at 38psi, runs fine, and not at 40 psi on the new reg.

Strainge.

ANy other ideas.

Has anyone found a simmilar problem before?

[blind_elk]

It shouldn't matter which way it is mounted - its simply a diaphragm with variable pressure applied to one side.

Free revving at 6k is unlikely to produce any boost, so the fuel pressure won't rise too far. And a constant free-revving 6k will still likely have a fair bit of vacuum happening in the plenum. So, again, the fuel pressure won't rise too far.

Really stupid question - you did connect manifold vacuum to the new FPR?

[Abo Bob]

Is it a rising rate reg?

[WogsRus]

yes i connected the vacume in and yes it's a rising reg, as in the vacume line as boost comes in provides extra pressure for the injectors.

however not sure what the rate is 1:1 or 1:2 and so on. MYBE the rate is too high and flods the motos, like i said, it's fine to drive off boost, no problems AT all, drive round all day, aslong as there is no boost.