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General Car Chat / Understanding DPF issues
« on: 17 February 2024, 10:01:37 »
Hi all - not had too many car issues in recent years but just hoping to get a bit of a strange one sorted today.
The Insignia 2.0 diesel auto (2012 93000 miles) has variable revs when at idle which has gone a little worse over last 3 weeks so that you now get a slight hesitation - again only noticeable at idle. The DPF warning came up just before this (say 4 weeks ago) so we gave it a run but haven't done any longish runs since. Took it to independent yesterday who read codes and showing DPF 86% blocked and cylinder low pressure. As they could not do forced regeneration they asked my permission to do cylinder leak test to which I agreed and later in day they came back with no issues and that the fault appears to be one glo-plug (type which has pressure sensor). I had googled all of this and Insignia sites have a lot of posts where this idling issue is prevalent - some have changed loads of parts, others ignore it.
Hoping today brings result but not sure why diagnostic wouldn't go straight to glo-plug fault?
The Insignia 2.0 diesel auto (2012 93000 miles) has variable revs when at idle which has gone a little worse over last 3 weeks so that you now get a slight hesitation - again only noticeable at idle. The DPF warning came up just before this (say 4 weeks ago) so we gave it a run but haven't done any longish runs since. Took it to independent yesterday who read codes and showing DPF 86% blocked and cylinder low pressure. As they could not do forced regeneration they asked my permission to do cylinder leak test to which I agreed and later in day they came back with no issues and that the fault appears to be one glo-plug (type which has pressure sensor). I had googled all of this and Insignia sites have a lot of posts where this idling issue is prevalent - some have changed loads of parts, others ignore it.
Hoping today brings result but not sure why diagnostic wouldn't go straight to glo-plug fault?