Well after driving the motor locally now for nearly a week, I have experienced a loss of power with the engine.
Happens when under a good load as in a hill climb.
If I back off the throttle, the power comes back then after 100 yards does the same again, feels like fuel starvation. New fuel filter, as far as I can tell the small pump near the rear wheel is working, no lights or warnings to the dashboard.
Could it be the in tank pump?
Mileage is 120,000 but the engine has only 15,000 miles on it.
Had it on the diagnostics, but have left the printout at work. Seem to remember something about boost pressure, but can't remember the fault code, will collect it tomorrow.

Steve. 1968 Series IIA Pastel Green, nearly there project

Check the turbo intercooler hoses for splits and tightness, sounds like the symptoms. There is nothing that can't be fixed with a hammer😜😜
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Will check the hoses again, I made sure they were fine when I fitted the engine.
Picked up the diagnostic sheet this morning and the fault was:
5232 Boost pressure control valve. can't find a reference to this code anywhere, this was with a Bosch KTS diagnostic unit. I will see what code I can pull with the old Omitec unit.
Will have to check that the item out. Also found this on another forum.
"There is a common fault with the Garrett turbo GT2256V, the variable nozzle partially seizes which in turn throws a fault with the boost pressure control actuator. Although this is not usually at fault".
Might be stuck with the engine being stood for 7 years before I fitted it, although the fault didn't show straight away, but appeared after a couple of days.

Steve. 1968 Series IIA Pastel Green, nearly there project

After driving it home last night and the same power loss, I got these codes.
No P, C, or U with them, just numbers.
1470 Boost pressure control.
1260 Fuel low pressure control.
9F6 Fuel pressure monitoring whilst starting.
Might take the turbo off and check that the variable nozzle and the pipes.

Steve. 1968 Series IIA Pastel Green, nearly there project

I'd be inclined to check the low fuel pressure side of things first

More than likely the pump underneath the tank. Very common issue

I take it that the pump although working can loose its capacity when pumping, hence lack of fuel delivery.

Steve. 1968 Series IIA Pastel Green, nearly there project

Yes it can

TD4 uses The same pump, and when failing gives similar issues.
The pump is capable of supplying 3.5 bar, but the car only needs 1.2 to physically start and idle

Changed the pump in front of the rear wheel and all is well again. The old one looked original with those crimp clips holding the pipes. 120,000 miles later no wonder it started to go faulty.

Steve. 1968 Series IIA Pastel Green, nearly there project

What happens if you fill the fuel tank and then try it again?

Are there ANY air bubbles in the clean pipe from the fuel filter to the rest of the system? FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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Well the fuel tank has half a tank of fuel in it and I could not see any air bubbles in the clear pipe from fuel filter to high pressure pump.
Had a run of around 50 miles today, mainly motorway, still not sure that the motor is running right.
Up to around 70mph and it is fine, pushing it to hold around 80 indicated on the speedo and it seems a little starved of fuel and slows down a fair bit to around 65mph. Pushing the accelerator down causes it to drop a gear and has a lack of urgency to get up to speed. Will have to see if it has logged any codes tomorrow.
Could it be the in tank pump?
Also a combined mpg of 18.3 mpg is showing on the screen, that seems a bit poor.

Steve. 1968 Series IIA Pastel Green, nearly there project

Try filling the tank right up and see what happens.

The intank pump can cause air bubbles under heavier fuel demands but cant always been seen on the see through pipe.

at 18mpg though i'd be checking things over as it sounds a miss. Maybe there is a boost leak somewhere or the IC is holed as its pretty exposed and under protected.

Would be worth a quick diag to see what the injectors are doing at idle and under load and i could maybe run that on my diag to compare for you. FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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Thanks for the info. Will try filling the tank and see what happens.
When I replaced the engine I checked the original turbo hoses they seemed fine, but I replaced them with the hoses off the newer engine. Intercooler looked fine, but as you say a small pin hole can cause problems, so will check that again and vacuum test it.
Will try to get some readings of the injectors at idle and load.
I will check today what codes if any have been stored.

Steve. 1968 Series IIA Pastel Green, nearly there project

No worries Steve! I'd pressure and not vacum check the pipe work though, easier to hear the hiss and test it with water/fairy liquid mix 😄😄 FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Well I had a chance to pull the codes this afternoon, the following was logged with Bosch KTS system:
1152 - Cooler fan control. This can be ignored for the moment as the viscous fan and fan cowl is off the motor at the moment, so the large plug going to the fan is disconnected.
1028 - Exhaust-gas recirculat. actuator (ARF), I have fitted a blanking kit in place of the egr valve. To eliminate this fault, I might re-fit the egr valve for now.
5232 - Boost pressure control valve. This fault was showing before I replaced the inline pump.

@Kingpleb

Did a test on the injectors at idle speed. First table shows Quality comparison/Fuelling compensation.

Cylinder 1, -1.10 mm3/S
Cylinder 2, 0.95 mm3/S
Cylinder 3, -0.84 mm3/S
Cylinder 4, -0.13 mm3/S
Cylinder 5, 0.68 mm3/S
Cylinder 6, -0.01 mm3/S

This table shows Idle speed/Cylinder balance.

Speed cylinder 1, 782rpm
Speed cylinder 2, 794rpm
Speed cylinder 3, 792rpm
Speed cylinder 4, 782rpm
Speed cylinder 5, 798rpm
Speed cylinder 6, 788rpm

This I suppose shows that the injectors are fuelling correctly at idle.

Will hopefully go out with a co-driver this week and see what is happening with the injectors under load and the boost problem.

There are differing meanings/terminology dependent on what diagnostic units are being used. I looked up the terminology on the Faultmate website as I currently have a Faultmate MSV2, which I used on the P38, I bought the software modules as and when I needed them for it.
A great piece of kit, never any problems, but to enable it for 6 modules which I would find most useful for the L322 would be £813.
For every module, but single vehicle only would set me back £677. I can't justify that compared to the Gap IID tool at around £390. With single use vehicle only, I would not be able to help anyone out locally if they got stuck.
So it will be going and I will put what I get for it towards a Gap IID unit.

A bit off topic at the end but a means to the end.

Steve. 1968 Series IIA Pastel Green, nearly there project

After some more investigations this afternoon, I have thrown up further problems.
After pressurising the pipe from the turbo, intercooler and pipe to inlet manifold I don't have any air leaks there.
I removed the EGR blank unit that I fitted off the old engine, cleaned up the existing EGR valve (checking that the vacuum unit works) and fitted it.
Connected the pipes to it and started the engine, started fine. Left it to warm up for 10 minutes and check for faults after clearing Boost pressure control valve and EGR actuator faults.
Attempted to rev the engine and noticed it was very sluggish getting up to around 3000 rpm then instantly reached 4000rpm. Did this a few times with the same results, also noticed a bit of smoke from the exhaust.
Took the car for a test drive, no power at all, foot to the floor, took around half a minute for the revs to slowly creep to around 3000 rpm then the car leapt into action. I stopped and tried again same thing. Limped back to workshop and looked at faults logged.
One fault showed up which I have not seen before: Pressure sensor, boost pressure control, deviation.
Replace the EGR blank unit, took out for another test, car runs fine, all be it looses power on hills, so back to normal with the existing faults.
Faults logged:
EGR, actuator and Boost pressure control valve.
I am at a loss, there is plenty of fuel, no fuel errors, all things could be pointing to the turbo or faulty boost pressure sensor (MAP sensor).
Anyone else experienced this problem?

Steve. 1968 Series IIA Pastel Green, nearly there project