Fuel Injector Pressue Regulator/Roll Over Valve

[Melkor]

So I've been looking around for a new fuel injector pressure regulator for my truck, and Holley seems to be the brand most people recommend...

 

But.

 

I've read different things when it comes to the PSI, with some people saying it should be 14 psi (which the manual suggests) and others say that since it's fuel injected it needs 45 psi.

 

There's also a load of different Holley regulators in general, and I'm having a bit of trouble finding which one would actually fit the truck...

 

 

I'm also having trouble finding what appears to be the roll over valve(?) everywhere I usually buy parts, and mine either needs to be replaced or deleted entirely at this point since according to several people who've apparently had this happen to them it's what's been killing my speed every time I go uphill.

Nissan discontinued it just like everything else, and no one else seems to sell one that fits my truck so...should I just go with their advice and delete it at this point?

 

 

Any advice would be appreciated.

 

Edit:  Any before I forget a new cover to go over the lever that shifts the truck from 2 wheel drive to 4 high/Neutral/4 low, since none of the places I usually buy from have that either, and mine is pretty trashed/lets in freezing cold air during winter.

[paradime]

Never delete the pressure regulator. Any variation in pressure will in turn change your fuel mixture.

 

https://www.partsgeek.com/catalog/1986/nissan/720/fuel_injection/fuel_pressure_regulator.html

 

Google first.

[paradime]

BTW, I played black jack at CalNeva while tripping on acid once. Fear And Loathing in Crystal Bay.

[Melkor]

Well yes, I wasn't talking about deleting the FPR, just the rollover valve/thing that keeps gas from spilling if you flip over/whatever you want to call it.

 

As for the link, I've already looked at that one and it's for a different engine, mine is the Z24i.

 

Thanks though, didn't expect a response so quickly.

 

[paradime]

5 minutes ago, Melkor said:

Well yes, I wasn't talking about deleting the FPR, just the rollover valve/thing that keeps gas from spilling if you flip over/whatever you want to call it.

 

As for the link, I've already looked at that one and it's for a different engine, mine is the Z24i.

 

Thanks though, didn't expect a response so quickly.

 

 

I defer to my second post. Sorry dude, wasn't paying attention.

[Melkor]

So upon further searching and comparing with the Z24i service manual, the pressure does have to be 14 psi, it appears the others talking about 45 psi were referring to the Z motors in the D21.

 

Found this on the Holley website and it appears to be right for the pressure I need, but does the Z24i use 3/8" NPT or 6AN?

 

And the valve above the tank that some people I know suggested I delete is in fact the fuel check valve/rollover valve, and after scouring the internet again I found some that might be compatible, but...well, same question as above really.

 

3/8" or some other AN measurement?

[Melkor]

Right, well I thought I had solved the fuel check valve at least, but apparently not.

The one I ordered was too big to fit the lines.

 

Now, there are a few listed on Ebay, but I'd rather not shell over 70+ dollars.

 

 

Anyone know the actual size on this?  I'm guessing 1/4 or 5/16, but I'd like to double check before buying again.