Felix.

307 HDI 1.4 51 plate

Engine speed - 803 rpm
Camshaft/crankshaft synchronisation - Yes
Measured fuel pressure - 267 bar
Reference fuel pressure - 267 bar
Fuel flow regulator - 34%
Measured injection flow – 5.49 mg
Cylinder injector 1 flow correction – 0.2 mg/impulse
Cylinder injector 3 flow correction – 0.3 mg/impulse
Cylinder injector 4 flow correction - -0.27 mg/impulse
Cylinder injector 2 flow correction – -0.17 mg/impulse
Diesel output delivered by the pump ref value – 905.88 Mm3/sec
Injector control error status - no fault
Measured air flow - 229 mg/impulse
Air flow setting - 227 mg
EGR value electrovalve OCR - 29%
Pre injection advance - 8
Main injection advance - -2
Coolant temp - 64
Fuel temp – 36
Air intake temp - 29
Atmospheric pressure – 1000 mbars


Engine speed - 803 rpm
Camshaft/crankshaft synchronisation - Yes
Measured fuel pressure - 227 bar
Reference fuel pressure - 314 bar
Fuel flow regulator - 29%
Measured injection flow – 9.02 mg
Cylinder injector 1 flow correction – 0.58 mg/impulse
Cylinder injector 3 flow correction - -0.03 mg/impulse
Cylinder injector 4 flow correction – 0.39 mg/impulse
Cylinder injector 2 flow correction – 0.88 mg/impulse
Diesel output delivered by the pump ref value – 2858.82 Mm3/sec
Injector control error status - no fault
Measured air flow - 388 mg/impulse
Air flow setting - 392 mg
EGR value electrovalve OCR - 49%
Pre injection advance - 8
Main injection advance - 2
Coolant temp - 15
Fuel temp – 5
Air intake temp - 6
Atmospheric pressure – 988 mbars


Can you have a look at the above results. The car is difficult to start and runs very lumpy, stalling until its warmed up – then it runs fine. The first set of results are when the car is warm , the second is when is running lumpy after start up. It starts first time, just very lumpy.

I have noticed that the ‘Diesel output delivered by the pump ref value’ fluctuates quite a lot. When it’s warm it flicks between 580 & 905 and when cold it cycles from -70 to 2858 (up and down) and seems to match the engine noise going up and down.

The car sounds very ‘tappy’ when driving until you get to about 3000 revs then it goes (not sure if this is just a normal noise with diesel Peugeots)

I have contacted a local diesel specialist who seems to think that it may be an injector issue, particularly the solenoids at the top of the injector which are prone to ‘fail’ when cold.

He suggested bringing them in for him to test which I may do, but I thought I’d ask on here first.

A global test shows two faults:
Permanent fault. Diesel high pressure regulation circuit. Pressure below reference value.
Permanent fault. Diesel high pressure regulation circuit. Maximum rail pressure exceeded

Do the results seem to support the fact that it’s an injector problem I have.

steve05wrx

Hi

I would be looking at a clogged or stuck Exhaust EGR valve.

These are notorious for clogging up and were only introduced by manufacturers to improve emissions - they are a right PITA!!

There are ways of bypassing them which will generally improve performance and economy - plenty of info on the net on how to do it.

Cheers

Steve

f1_fan

iTrader: (9)

Looking at those figures what is going on with injectior 3 when it is cold?

rob84

iTrader: (5)

By the results of the test you've run already and the faults your showing. That almost looks like a sticky Suction control valve on the high pressure fuel pump, these are common failures on some models of vehicle. we have the same issue with Isuzu if the customer has been using contaminated fuel. this would also make sense as to why your fuel pressure fluctuate as much as they do.

The tappy sound is usually associated with very high fuel pressure aka diesel Knock