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Old 19-01-19, 10:44 AM   #1
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Default 04 expert 1.9 diesel knock

Hi can any body help with this .. I’ve replaced the advance solenoid. I’m now looking for the obd port , the one one by the bonnet catch doesn’t fit my reader.. any ideas on obd reading or suggestions of what to look for with this hurrendous knock .many thanks
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Old 19-01-19, 10:53 AM   #2
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Hi welcome to the forum....I've moved your problem to the 'expert' sub forum for specific model advise...all our regulars will read every post but it helps anyone searching for an answer...welcome again
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Old 19-01-19, 11:35 AM   #3
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This is usually caused by the timing sensor not getting the correct signals sometimes the sensor/wiring goes bad sometimes the sensor lugs fall off the flywheel
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Old 21-01-19, 09:07 AM   #4
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Ok I’ll take a look .. is this referred to as the crankshaft sensor .. and does this apply to dw8 engine ....thank you
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Old 21-01-19, 10:58 AM   #5
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Well some would call it that but its not really the same thing it is just a reference sensor but as i say it not really the sensor thats the issue usually the lugs on the flywheel break or fall out there are 2 on the flywheel and the very basic ecu uses these to tell it TDC and it then controls the electronic part of the pump to correct timing it also has a sensor on 1 injector to help with this task.
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Old 21-01-19, 03:09 PM   #6
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Changed the flywheel sensor but no change .. noticed some fine diesel mist and a damp stop solenoid as I changed this last year . Would this be to blame ... engine light on now too
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Old 21-01-19, 03:42 PM   #7
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As i already said changing the sensor wont help remove the sensor again look in the hole while someone turns the crank look for the 2 lugs mark 1 with paint and turn it till you see the other if both are intact the problem is elsewhere but this is the most common reason

Has it had a clutch recently?
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Old 23-01-19, 07:46 AM   #8
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No it’s not had a clutch... there seems to be fuel vapour around under torch light and the stop solenoid is leaking ... I’ll try looking at the flywheel lugs too ... engine light is on now .. I’m wondering wether I can get a code off it
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Old 23-01-19, 02:47 PM   #9
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Ok its common for people to break the lugs while removing the box doing a clutch hence the question leaky solenoid wont make it knock or put the light on
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Old 25-01-19, 08:57 AM   #10
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Can anybody advise if I need a special obd reader for my 04 expert 1.9. The one I have doesn’t seem to fit.. I’m presuming the green port located by the bonnet catch is the obd diagnostic port . Many thanks
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