91 civic b18a1 ..code 43 ..
changed fuel filter
purchased a fuel pressure gage
installed a warbro 255
changed injectors
still 0 psi if I clamp the return it'll spike 60 then come down to about 10 psi
if I clamp before the fuel rail it'll have correct pressure then die...
used a few different fprs
gage is on the filter I'm lost any help appreciated

 

Anything and everything that can effect your fuel supply.
There isn't a sensor on your fuel pump, fuel filter, or injectors.
The code comes up when the O2 sensor thinks something is wrong with the exhaust gas content.

Ignition system will cause unburnt fuel
(- Spark plugs, spark plug wires, distributor cap, etc)
O2 sensor
injectors
fuel pressure regulator
​​​​​​​Vacuum lines

 

Changed all of that ..could use plugs
vacuum ..I couldn't find a diagram seems OK
there is no charcoal canister if anyone has a diagram that would be awesome..
Can vacuum cause low fuel psi
​​​​​​​replaced 02 with a denso

 

Because I didn't read...

you should have pressure right when you turn the key to ON and the pump primes the system.

You have zero pressure?

i see you changed FPRs but I find it really odd that you can clamp BEFORE the rail and get pressure.
Clamping after the rail should have the exact same effect, but you are getting a pressure spike and then low pressure.

The only thing between the inlet to the rail and the FPR is the injectors.

Sounds like your injectors are holding wide open and dumping fuel..

 

Yeah that's what I was thinking it's so weird man and I've changed the injectors twice... I'm starting to think the fuel return right off the sending unit when I replaced the pump it looked pretty rusty ..Idk how deep tho and it wasn't wet so didn't think anything of it......
car has the monotech mpfi swap harness. .

 

Ecu maybe I'm gonna take a video tomorrow morning

 

How do you post videos

 

youtube works

 

I think I've found the issue fuel tank level sender is bent and not sealing ..I didn't think that could cause it but I'm thinking is that ... I'm just gonna buy a new tank and sending unit see what happens

 

OK so I put in a new tank now I haven't ran it enough to make the cel come on. .But still feels sluggish the gage is a vms. . I'm thinking that might be faulty when I swap pfr the gas sprays out like a lot and it runs so I know there has to be a decent amout of pressure to run I'm going to look at the 02 again and try a pm6