Toyspeed.org.nz Message Board

by **gleem** » Thu Jul 22, 2010 1:30 pm

Ive got a chinese fuel pressure reg. Ive cut the fuel line that goes to the standard fpr and put the unit in between. Ive taken the standard fpr of and ground the top down untill the spring came out. Put it back etc and now nothing shows up on the guage. even when i adjust it the needle does up and down a bit when the car is about to stall.

its stange the line going to it doesnt go through the fuel filter. that line goes some were else, i presume other end of fuel rail.

Is something wronf with this?

by **sergei** » Thu Jul 22, 2010 2:07 pm

What car is this?

Normally the fuel goes like this:

fuel filter => dampener (optional) => rail => pressure regulator => return line

You are supposed to replace original fuel pressure regulator with aftermarket.
What you could do is make an adapter out of spare pressure regulator and feed it to new regulator, which then relieves to the return line.

One way to make the adapter is to grind the top off (until what you are left is flange with a hole in the middle, and obviously bottom bit with O ring intact) and tap a fitting into that hole that connect to the fpr.

by **gleem** » Thu Jul 22, 2010 2:16 pm

rb20det. I was told if you grind the top off the stock one and take the spring out it is no longer a regulator and fuel can flow through freely?

by **wde_bdy** » Thu Jul 22, 2010 2:20 pm

If the fpr is at the end of the rail and you have put the new one in the return line, have you got it facing the wrong way? To test if the factory one is just bypassing as you expect it to pull the return line off the end and check that fuel flows out (into a container for safety) when you turn the key on and the fuel pump starts.

Callum

by **gleem** » Thu Jul 22, 2010 2:25 pm

ok will do. so adjustable fpe should be in the return line at some point correct? google was surprisingly unhelpfull on this topic

by **sergei** » Thu Jul 22, 2010 2:32 pm

gleem wrote:ok will do. so adjustable fpe should be in the return line at some point correct? google was surprisingly unhelpfull on this topic

http://forums.nicoclub.com/how-to-set-y ... 14558.html

by **gleem** » Thu Jul 22, 2010 2:39 pm

sorted now thanks everyone. I had put the unit in the wrong way even after following instrutions(arrows and chinese writing) turns out arrows going in and out of the unit in the picture doesnt represent fuel flow haha

by **tsoob** » Thu Jul 22, 2010 4:37 pm

gleem wrote:Ive got a chinese fuel pressure reg.

this worries me

by **KinLoud** » Thu Jul 22, 2010 10:17 pm

I helped pick up a cefiro for a mate.

Luckily it had a flat battery when we tried to start it...!!!!!

Lucky because we opened the bonnet, connected jumper leads and then cranked it over...

There was a big spray of fuel!
Fuel was spraying out from the almost new aftermarket fuel pressure regulator in all directions from the gasket that sealed the 2 parts of the regulator together.

If it didn't need a jump start the car probably would have caught on fire while it was being driven to its new owner!

The guy selling the car said "yeah I thought that regulator was probably a piece of junk but it was cheap off trademe"

FARK!

Ken

by **gleem** » Thu Jul 22, 2010 10:31 pm

NO, it wont happen to me

by **tsoob** » Fri Jul 23, 2010 12:06 pm

gleem wrote:NO, it wont happen to me

this worries me

Website · by **Bling** » Fri Jul 23, 2010 2:16 pm

Surely there are some parts you just don't skimp on :lol:

OMG so shiny! · by **Dell'Orto** » Fri Jul 23, 2010 6:46 pm

BZG|Bling wrote:Surely there are some parts you just don't skimp on

Nah check out some of his other posts :lol:

by **2jayzgte** » Fri Jul 23, 2010 6:53 pm

tsoob wrote:
gleem wrote:Ive got a chinese fuel pressure reg.

this worries me

Yep those were my first thoughts when reading his post aswell.

by **MAGN1T** » Sat Jul 24, 2010 11:12 am

gleem wrote:Ive got a chinese fuel pressure reg. ?

But why though?
What's wrong with the stock one?

Steve

by **sergei** » Sat Jul 24, 2010 11:56 am

MAGN1T wrote:
gleem wrote:Ive got a chinese fuel pressure reg. ?

But why though?
What's wrong with the stock one?

Steve

Absolutely nothing. He was scammed into thinking that it will give him extra 10hp or whatever.

by **MAGN1T** » Sat Jul 24, 2010 1:24 pm

If you've fitted a bigger pump and it outflows the stock reg, then the best fix is to do what the factory does on bigger motors.
That's to modify the pump circuit with a resistor that's switched out at higher loads.
Contrary to popular belief it's NOT just to make it run quieter, it's to save wear on the pump, to not outflow the reg and to not outflow the return line.
The factory way is always best because it's designed by engineers rather than aftermarket parts salesmen.

Steve

by **gleem** » Sat Jul 24, 2010 5:40 pm

rb20det. Running slightly bigger pump and its got a few very upgraded bits so nissan specialist joe kyle recommended me to get one so i did (not chinese though) as it still may be running a little lean

by **stolic** » Sat Jul 24, 2010 6:37 pm

gleem wrote:rb20det. I was told if you grind the top off the stock one and take the spring out it is no longer a regulator and fuel can flow through freely?

did they tell you that, if the internal diaphram in the fpr leaks, it will send fuel pumpin out of your freshly grinded hole? AFAIK fpr's are sealed units for a reason.
surely a better option would be to spend $40 and get a proper adaptor like this...

http://www.trademe.co.nz/Trade-Me-Motor ... 857659.htm

sure it's D1 Spec, but it's gotta be safer. I'm all for cheap/free mods, but some corners should not be cut

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