No High pressure feed from the Pump

[miles]

Posting for a mate round the back of me with a HDI, He basically only has low pressure at the fuel rail, changed the High Pressure pump and still the same, Any obvious things to check as my knowledge of HDI's is zero

[dturbopeck]

In tank pump, pull the pipe off to the fuel filter, and crank and see off u get a good strong supply of fuel, other than that u may have a I knackerd injector

[C2K]

You got Peugeot Planet miles? Any fault codes or anything untowards?

Likely a dying LP pump or a dicky fuel pressure regulator.

[Poodle]

Almost certainly fpr. If youve got any pressure at all the lift pump is probably working fine. Have a look at my guide thread on the subject, should see him right.

[miles]

Yes the low Pressure pump is fine, good flow to the injectors. No codes but that means nothing on these old Girls,
Will try and find a FPR

[Poodle]

FPR is on the end of the hp pump, held in by two torx screws.

What's the actual issue, cutting out/won't start/poor running?

[miles]

Just will not start unless you add some easy start, The seals on the pump have been done but made no difference, If on the pump thou knowing the other pump came off a running engine the same problem was apparent

[Poodle]

Sounds like you haven't got enough pressure at the rail, but that would throw a code. Only real option i can think of that wouldn't throw a code is the immobiliser.

[dturbopeck]

Have you checked the glow plugs?

[Poodle]

Glow plugs arent necessary to start an hdi in british weather conditions.

[dturbopeck]

I've seen glow plugs cause this fault before, I've put a high pressure pump on before the realised it was the glow plugs at fault, so they must have some impact when starting,

[Poodle]

Fair enough, random. Mine dont work and its been fine all winter haha!

[C2K]

I've never touched a glowplug in the entire 8 years i've had the car, HDI barely uses them. Even in baltic -14 mine started on the dot.

FPR for sure, was my first thought.

[miles]

FPR is part of the pump has all been swapped over, You should get allot of pressure when cranking at the rail I would have thought not normal indirect injection flow

[cully]

sounds to me there is too much leakoff on the injectors for the pump to get enough pressure to allow the ecu to inject

[Poodle]

The fpr doesn't always come with refurbished pumps, thought it was worth checking. The HDi needs ~280bar to fire, not much more than you'd see on an idi. If there really is that little fuel up at the rail, you will have a fault code, try getting a better reader on it.

In the meantime you could stick a multimeter on the FRPS to see what pressure it's seeing - should read about 1.3v at cranking. If that's right then you're looking at a loom or ecu/immob fault.

[miles]

Thanks so far, he's away for 7 day's now so will pass the info on, Catch 22 as too much time on here isn't cost effective so it's looking like the scrapper at the moment