Return lines are connected yep.

I'll recheck timing with the x 2 sensors, and pray.

Atleast I now have some hope lol.

Reset the timing.

And watched the injector fire.

Set her back up, bled the fuel through.
She fired straight up. Ran like a dog, wouldn't rev past 3000rpm.
Then cut out.


Now, I've got p0087-21 fuel rail/system pressure to low.

And from 20000kpa on crank. To 500kpa

You couldn't make it up

I cracked the fuel line from pump to rail. And there is fuel coming from the pump.

P0087-21 Fuel Rail/System Pressure -Too Low - Signal amplitude <minimum

• NOTE: - Circuit I_A_RALPS -

Fuel rail pressure sensor circuit short circuit to ground, short circuit to power, open circuit, high
resistance

Fuel starvation

Fuel lines leaking

Fuel lines restricted

Blocked air filter

Refer to the electrical circuit diagrams and check the fuel rail pressure sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance

Check the fuel lines for any signs of leakage, replace as required

Check the fuel lines for any signs of damage, crimping or restrictions, replace as required

Check for blocked air filter, replace as required

I would check to see that the ECM to Sensor-Pressure-Fuel Rail was connected and undamaged first and all connections were tight and sound. Don't go looking elsewhere, without thoroughly checking for this especially around where you have been working.

Also your readings may be derived from this (faulty?) circuit, and be meaningless. FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011)
FL2 Metropolis SD4 Auto 2014 2017- (16k - 79k+ miles) (MY2015)
Metro in its 11th Year of (Extended) LR Warranty / Full LR Service History
(Expensive, but Trouble/Worry free - hopefully?)

Just to point out, noid lights do work on these engines. Cheap enough and will tell you if the injectors are receiving a signal. Now at the point when I learn something new something old is lost out the other side !
Now retired so it doesn't matter anymore.
Freelander now gone.

Did you fix this issue Jw2000uk?

Ac

Got it going, but ran like

Tried a fair few things, but the months had taken its toll on the interior. So Scrapped it..

And got a HST FL2.

Eek! I’m chasing a p0087-22 fuel rail pressure low problem… switched out the HPFP today… no change.

Rail pressure is controlled by the pressure relief valve on the end of the fuel rail. Maybe it's not holding pressure, so bleeding rail pressure back to the return lines? Hyundai Ioniq 5 Ultimate. The family car.
2009 Rimini Red SE TD4. Gone.
2006 Tonga Green i6 HSE. Gone.
Audi A5 convertible, my daily driver.
1972 Hillman Avenger GT, the project.

Is that the pressure relief regulator? Was thinking of this and/or the sensor at the far end.

Update - fitted a replacement HPFP, fuel rail pressure sensor and fuel rail regulator.

Engine still cutting out and going into reduced performance.

was initially coming iup with egr faults (stuck open etc) but these are gone and the one that haunts me still is low pressure in the fuel rail. Filter was changed to LR genuine but no resolve.

wondering if its on the low pressure side or injectors?

Note - These symptoms started appearing several months after running out of fuel (not sure if related) but the first guy from green flag couldnt get it started, the specialist came out and im pretty sure he opened the supply lines to one of the injectors to get it started - not sure if this is relevant?

No mention of live data readings, what are they

This is a snapshot of live data from fuel rail. You can see it sits at what I think is a normal level then ‘blips’ down, some times it recovers, other times it’s cuts out.

If the car hasn’t moved for a few weeks… it drives great for the first 5 or so miles then switches back to cutting out.

I’m a novice, so any data you need, let me know and how to get it and I’ll do that.

Cheers!

Reading this Tread - I have the same problem.. Did anyone get to the bottom of it.?

I narrowed it down to the HP Regulator valve but cant be sure if its the valve or is it the signal.?

Im getting 3.7ohm resistance when testing the PRV

When the engine is switched on - I get a 12V signal from the loom to the Reg. But the reg doesn't change state.

when I connect the Reg direct to the battery - It changes state and locks in the pressure.

Maybe its a current issue..?

I got the car started by blocking the relief port, (stopping the fuel escaping through the Pressure regulator.), the pressure went up and the engine started but quickly shut off. possible as the pressure went to high..

The problem is defiantly a common rail pressure problem.

I will probably buy a new HP Regulator and hope this fixes it..

IanMetro wrote:

IanMetro wrote:

I think that this is a description of the Circuit ( O_T_PCV ) that is indicated as faulty. (From Repair Manual)

Pressure Control Valve (PCV)

[i]The PCV is mounted in the end of the fuel rail (transmission end) and connected to the ECM via the engine harness. The
PCV is a solenoid-operated valve controlled by a 12V PWM signal. The ECM operates the PCV to adjust the fuel pressure
within the fuel rail.

Relieved fuel is directed through the fuel rail leak-off pipe to the fuel filter return circuit. The leak-off
fuel also provides cooling and lubrication for the PCV.
For additional information, refer to: Electronic Engine Controls - 2.2L Diesel (303-14 Electronic Engine Controls - 2.2L
Diesel, Description and Operation).

The PCV is normally open when the solenoid is not energized by the ECM. The resistance value of the PCV solenoid coil is
3.6 ohms at 20°C (68°F).

The PCV is also used by the ECM to provide direct control of the fuel system, in the following situations:

During sudden transient phases in engine speed (suddenly lifting off the accelerator pedal, for example) where VCV
action is not sufficient to affect the supply of fuel to the fuel rail.

To control fuel pressure in the event that the VCV fails.

During the fuel heating period, when supply fuel temperature is less than 40°C (104°F). The VCV is fully opened by
the ECM and the HP pump compresses a maximum quantity of fuel to raise the fuel temperature. The PCV is then
modulated by the ECM to provide leak-off fuel from the fuel rail to the fuel filter return circuit. The fuel is then
recirculated through the fuel filter and back to the HP pump.

When the fuel supply temperature is greater than 70°C (158°F). The PCV is modulated by the ECM to release fuel
rail pressure, subsequently decreasing the fuel temperature to protect the fuel system components. Leak-off fuel
from the fuel rail is directed to the fuel filter return circuit and back to the fuel tank.

During engine shutdown to progressively collapse fuel rail pressure.[/i]

I keep reading this thread as I may be missing something, but I cannot see that you have either checked the ECM to Valve wire for continuity again since garage fix?, or used a scope or similar to check the Pulse Width Modulated Signal being sent to it.

The Brown/White wire is marked as that Circuit ( O_T_PCV ) --- (PCM Signal), and needs to be checked fully., as you said the valve is normal open and closes according to the width of this signal.

As you were working in that area before fault, you may have disturbed or damaged the wiring.

P009B-00 Fuel Pressure Relief Control
Circuit/Open - No sub type
information
• NOTE: - Circuit O_T_PCV -
Pressure control valve
control circuit open circuit
Refer to the electrical circuit diagrams
and check pressure control valve circuit
for open circuit
Carry out the pinpoint tests associated
with this DTC using the manufacturer
approved diagnostic system

IanMetro wrote:

Link explaining how the PWM valve signal is measured.

https://www.picoauto.com/library/automotiv...sch-cdi-3/