^ Spot on.
I don't think the FPR can come anywhere close to completely closing off flow, though I've never checked.
You can check the fuel pump flow by running the fuel line into a pail and running it for a certain amount of time then measuring the amount in the pail. I don't remember the specs.
EvilStig":22zh3rjq said:
grip-addict":22zh3rjq said:
Well... After looking at the link I found and what RedCelicaTRD posted... They appear to be the same thing. So in order to try to be at least somewhat helpful, attached is your photo but with the fuel feed line in red. 93celicaconv is correct, you need to get your pressure signal before the fpr. Either the banjo bolt at the head of the fuel rail or the banjo bolt at the fuel filter are fine locations to use and replace with the adapter.
Ok but if I get it upstream of the FPR then how do I check function of the FPR?
The red is the return line not the feed line. The feed line runs from the right side of the picture to the FPR.
EDIT: or am I completely misunderstanding the function of the FPR here?
FPR creates pressure upstream of itself. So you check function (pressure) upstream.
Yes, red is actually the return line. It's before the FPR but after the injectors. So it is pressurized.
The easiest way to check pressure is put one of those fittings at the fuel filter as said. You will need something to thread into the linked fitting for your fuel pressure hose. Does that make sense?
Also, if it's too confusing you can ignore this part. Personally I like all the info so I can make my own decision, so I try to give all the available info. But this stuff isn't necessary, you'll be fine doing what others have suggested.
There are actually 3 places you can check fuel pressure. The banjo bolt at the filter, the banjo bolt at the other end of the fuel rail (I think this has been mentioned too, and I THINK it's the same thread? But a shorter bolt? You'll have to confirm size. The third place is the cold start injector (CSI) port. I'm pretty sure you can just remove this hose and permanently install a banjo fitting here. This injector only runs while the starter is working and the engine should still start without it. Though with you being in Canada and colder than here you may need it.
The thread for the CSI port is smaller than the other 2 and I don't know if you'll even be able to find a fitting for it.
As far as the banjo fitting you need, you can use the linked one. There are other options (at least there used to be?). That one has a female port, so you'll need some type of male fitting to go into it.
There are (were) fittings with male extensions you can also use.
Whatever fitting you get has to have the correct metric thread to attach to the factory fuel filter/rail. The other side of the fitting has to match whatever you're attaching to it. In this case your fuel pressure gauge hose/connection. Which will probably be standard thread (at least here in the US, not sure what's available up in Canada).
You can set this up to be a permanent test port if you want to. You'll just need a way to seal your opening. Either a plug for a female port or a cap for a male. Something that will hold the pressure.
There's also the possibility of a self sealing fitting (think your tire valve stem, but for fuel) if you can find something that will match thread wise.