Disco 2 D2 splutter

archwayanimal · Jun 30, 2017

my 2003 D2 has started to splutter now and again - seems to be running just fine then I'll get a splutter and then it's fine again. Not all the time - did it just now as I was accelerating at about 40mph and then again at 60. Any ideas?

neilly · Jun 30, 2017

Can you get it on running diagnostics? So that you can record the data?

Is it a big stutter or just a minor one?

Cheers

sierrafery · Jun 30, 2017

fisrt suspect is oil in the ECU red plug though as @neilly said a tester session would be relevant

brian47 · Jun 30, 2017

Wot @sierrafery said.
The first place to look for rough running and strange engine behaviour is the red plug on the engine ECU. Oil runs back along the wires from the injector harness in the cylinder head.

archwayanimal · Jul 1, 2017

I'll have a look. Have got a Nanocom and plugged it in yesterday but frankly have no idea about diagnostics - just use it to check for faults. Did change the injector harness a couple of years ago - can they cause trouble that soon?

neilly · Jul 1, 2017

archwayanimal said:
I'll have a look. Have got a Nanocom and plugged it in yesterday but frankly have no idea about diagnostics - just use it to check for faults. Did change the injector harness a couple of years ago - can they cause trouble that soon?

Save the data and post it on here. Then others can always read it and tell you their thoughts.
Injector harness' have been known to fail quickly, especially cheap copy ones.

Cheers

archwayanimal · Jul 1, 2017

Stupid question - which diagnostics am I looking for?!

neilly · Jul 1, 2017

Engine diagnostics .............

Not sure what you are asking tbh.

Cheers

Shimsteriom · Jul 1, 2017

Check the ECU first, this may give you an idea of any recordable faults. Bear in mind that some issues will not show up as faults on the Nanocom as I am well aware now.

archwayanimal · Jul 2, 2017

Here are the readings:

Engine Speed (rpm) Road Speed (Km/h) Idle Speed Error (rpm) Accel. Way 1 (V) Accel. Way 2 (V) Accel. Way 3 (V) Accel. Supply (V) Battery (V) Air Flow (gr/hr) Ambient Pressure (Kpa) Manifold Turbo Pressure (Kpa) Air Inlet Temp. (°C) Coolant Temp. (°C) Fuel Temp. (°C) EGR Inlet (%) EGR Modulator (%) Wastegate Modulator(%) Cylinder 1 Cylinder 2 Cylinder 3 Cylinder 4 Cylinder 5

1713 0 958 1.034 4.021 4.657 4.993 13.94 131.8 100.79 106.66 44.9 75.9 60.4 0 0 0 -2 1 1 0 0
1723 0 964 1.023 4.021 4.657 4.993 14.1 132.6 100.52 106.94 44.7 75.9 60.4 0 0 0 0 0 0 -1 1
1776 0 1066 1.065 3.993 4.657 4.993 14.22 139.8 100.52 107.51 44.7 75.9 60.5 0 0 0 0 2 -1 -1 0
2011 0 1173 1.023 4.027 4.657 4.993 14.13 153.5 100.52 109.87 44.7 75.9 60.5 0 0 0 -1 1 0 0 0
1954 0 1192 1.029 4.021 4.657 4.993 13.69 154.1 100.52 109.58 44.7 76 60.5 0 0 0 -1 1 1 -1 -1
1952 0 1192 1.034 4.021 4.657 4.993 14.03 155.1 100.38 109.87 44.5 76 60.7 0 0 0 -3 2 2 -1 0
1357 0 510 1.018 4.039 4.657 4.993 14.07 89.4 100.38 106.37 44.4 76 60.7 0 0 0 2 4 10 0 -5
1782 0 1068 1.06 4.005 4.657 4.993 13.72 141.1 100.66 107.23 44.2 76.4 60.9 0 0 0 -1 1 0 0 1
2112 0 1359 1.072 3.987 4.657 4.993 14.13 168 100.52 111.44 44.2 76.4 60.9 0 0 0 0 -1 2 0 -1
2055 0 1277 1.049 4.005 4.657 4.993 14.07 162.3 100.52 111.33 44.2 76.5 60.9 0 0 0 1 0 0 0 -3
1956 0 1192 1.029 4.021 4.657 4.993 13.94 156.6 100.52 109.87 44 76.5 61 0 0 0 -1 0 2 -1 0
1057 0 5 0.678 4.362 4.657 4.993 14.03 58.2 100.79 105.19 43.9 76.5 61 0 0 0 -1 1 -2 0 2

Karrier-Bag · Jul 2, 2017

Sorry wrong topic so I edited post can someone delete for me please

neilly · Jul 2, 2017

archwayanimal said:
Here are the readings:

Engine Speed (rpm) Road Speed (Km/h) Idle Speed Error (rpm) Accel. Way 1 (V) Accel. Way 2 (V) Accel. Way 3 (V) Accel. Supply (V) Battery (V) Air Flow (gr/hr) Ambient Pressure (Kpa) Manifold Turbo Pressure (Kpa) Air Inlet Temp. (°C) Coolant Temp. (°C) Fuel Temp. (°C) EGR Inlet (%) EGR Modulator (%) Wastegate Modulator(%) Cylinder 1 Cylinder 2 Cylinder 3 Cylinder 4 Cylinder 5

1713 0 958 1.034 4.021 4.657 4.993 13.94 131.8 100.79 106.66 44.9 75.9 60.4 0 0 0 -2 1 1 0 0
1723 0 964 1.023 4.021 4.657 4.993 14.1 132.6 100.52 106.94 44.7 75.9 60.4 0 0 0 0 0 0 -1 1
1776 0 1066 1.065 3.993 4.657 4.993 14.22 139.8 100.52 107.51 44.7 75.9 60.5 0 0 0 0 2 -1 -1 0
2011 0 1173 1.023 4.027 4.657 4.993 14.13 153.5 100.52 109.87 44.7 75.9 60.5 0 0 0 -1 1 0 0 0
1954 0 1192 1.029 4.021 4.657 4.993 13.69 154.1 100.52 109.58 44.7 76 60.5 0 0 0 -1 1 1 -1 -1
1952 0 1192 1.034 4.021 4.657 4.993 14.03 155.1 100.38 109.87 44.5 76 60.7 0 0 0 -3 2 2 -1 0
1357 0 510 1.018 4.039 4.657 4.993 14.07 89.4 100.38 106.37 44.4 76 60.7 0 0 0 2 4 10 0 -5
1782 0 1068 1.06 4.005 4.657 4.993 13.72 141.1 100.66 107.23 44.2 76.4 60.9 0 0 0 -1 1 0 0 1
2112 0 1359 1.072 3.987 4.657 4.993 14.13 168 100.52 111.44 44.2 76.4 60.9 0 0 0 0 -1 2 0 -1
2055 0 1277 1.049 4.005 4.657 4.993 14.07 162.3 100.52 111.33 44.2 76.5 60.9 0 0 0 1 0 0 0 -3
1956 0 1192 1.029 4.021 4.657 4.993 13.94 156.6 100.52 109.87 44 76.5 61 0 0 0 -1 0 2 -1 0
1057 0 5 0.678 4.362 4.657 4.993 14.03 58.2 100.79 105.19 43.9 76.5 61 0 0 0 -1 1 -2 0 2

You may want to record the info while you are driving, this is stationary.

Cheers

jamesmartin · Jul 2, 2017

archwayanimal said:
I'll have a look. Have got a Nanocom and plugged it in yesterday but frankly have no idea about diagnostics - just use it to check for faults. Did change the injector harness a couple of years ago - can they cause trouble that soon?

yes

archwayanimal · Jul 2, 2017

many thanks all - just removed the ECU to find the red plug covered in oil etc, so will be replacing the injector harness tomorrow! Assume its fiddly but not beyond the wit of man to DIY.

jamesmartin · Jul 2, 2017

archwayanimal said:
many thanks all - just removed the ECU to find the red plug covered in oil etc, so will be replacing the injector harness tomorrow! Assume its fiddly but not beyond the wit of man to DIY.

easy job, just remove rocker cover and unclip the harness

neilly · Jul 2, 2017

archwayanimal said:
many thanks all - just removed the ECU to find the red plug covered in oil etc, so will be replacing the injector harness tomorrow! Assume its fiddly but not beyond the wit of man to DIY.

FYI
http://www.discovery2.co.uk/Injector_harness.html

Cheers

archwayanimal · Jul 2, 2017

superb, thank you.

archwayanimal · Jul 5, 2017

So I changed the harness - assume all went well as no evidence of oil flying around anywhere - again assume it would be pretty obvious if something was wrong. However still get the odd splutter - there is some residual oil in the loom and am cleaning this out each day - would a little bit of oil in the red plug be enough to make it cough? Mechanic told me to listen to the fuel pump when turning on ignition but that sounds fine..

Simon098 · Jul 6, 2017

archwayanimal said:
So I changed the harness - assume all went well as no evidence of oil flying around anywhere - again assume it would be pretty obvious if something was wrong. However still get the odd splutter - there is some residual oil in the loom and am cleaning this out each day - would a little bit of oil in the red plug be enough to make it cough? Mechanic told me to listen to the fuel pump when turning on ignition but that sounds fine..

Yeah the oil will take a while to empty out, I took mine off about once a week for a couple months and cleaned it out with brake cleaner. Seems good now. Are you sure you don't have a slightly stuck turbo actuator too? The movement should be completely free throughout the stroke length.

If so, it's easy enough to fix, get some 3 in one oil or something similar, not WD40 or Penetrating fluid, it evaporates too quickly. Spray it onto the actuator bush bearing and move it in and out with a pair of mulgrips on the actuator rod.

archwayanimal · Jul 17, 2017

I oiled the actuator rod as above but driving down the motorway just now a few times when accelerating hard at 70 the car almost lurched or kangarooed before carrying on. Plan to replace waste gate modulator valve tomorrow - is this a likely cause of the problem?

Disco 2 D2 splutter

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