Have owned Td5s for the past 10 years & thus seen the "oil in loom" problem revealed in various forms.
As of today my '04 Disco Td5 started behaving extremely oddly, subtly clunky at idle (feels as if the vehicle is being given hand pushes from behind), then normal when given throttle, but once boot is off the throttle the engine starts misfiring (not the typical 1 cylinder misfire but something rather massive) and comes to a stop. Engine re-starts as if nothing had happened but said behavior persists.
Nanocom shows 'peak charge long', 'peak charge short' & 'open circuit' faults randomly in all injectors, I have cleared these several times and they keep showing up each time the engine shuts down. Also worth noticing is that "Idle Speed Error" is now between +/- 12, whereas before was well within the +/- 4 range and the engine felt a lot smoother. All other fueling parameters are within specs, also no abnormal smoke, oil level normal, coolant level normal, coolant clean, etc.
Evidence would typically indicate a rather intense oil-in-loom problem but... injector harness is practically new (replaced 2 months ago) and there are absolutely no traces of oil in connectors C0521-C0171 (injector harness to engine harness) and C0158 (red plug to ECU). Checked continuity in all 7 conductors (5 injectors + 2 grounds) from each individual injector connector to the ECU & found no conductivity problems at all. Also verified battery, fuse boxes (relays & fuses), alternator & grounding at various points, all to no avail. Pulled ECU apart just in case... also completely dry.
Though I believe it's fuel delivery related (fuel sender, fuel filter, fuel pressure regulator or maybe CKP sensor), it is the apparent electrical nature of this problem that has me puzzled.
Any thoughts more than welcome.
Regards
Matt
As of today my '04 Disco Td5 started behaving extremely oddly, subtly clunky at idle (feels as if the vehicle is being given hand pushes from behind), then normal when given throttle, but once boot is off the throttle the engine starts misfiring (not the typical 1 cylinder misfire but something rather massive) and comes to a stop. Engine re-starts as if nothing had happened but said behavior persists.
Nanocom shows 'peak charge long', 'peak charge short' & 'open circuit' faults randomly in all injectors, I have cleared these several times and they keep showing up each time the engine shuts down. Also worth noticing is that "Idle Speed Error" is now between +/- 12, whereas before was well within the +/- 4 range and the engine felt a lot smoother. All other fueling parameters are within specs, also no abnormal smoke, oil level normal, coolant level normal, coolant clean, etc.
Evidence would typically indicate a rather intense oil-in-loom problem but... injector harness is practically new (replaced 2 months ago) and there are absolutely no traces of oil in connectors C0521-C0171 (injector harness to engine harness) and C0158 (red plug to ECU). Checked continuity in all 7 conductors (5 injectors + 2 grounds) from each individual injector connector to the ECU & found no conductivity problems at all. Also verified battery, fuse boxes (relays & fuses), alternator & grounding at various points, all to no avail. Pulled ECU apart just in case... also completely dry.
Though I believe it's fuel delivery related (fuel sender, fuel filter, fuel pressure regulator or maybe CKP sensor), it is the apparent electrical nature of this problem that has me puzzled.
Any thoughts more than welcome.
Regards
Matt