Home > Technical > 2010 Defender Puma 110 ticking over, but not going into idle |
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jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8025 |
What's crank sensor doing?
So it turns over every time? Just sometimes fires sometimes doesn't? Or doesn't turn over or turns over slowly? Or turns over fast but doesn't fire at all? Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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2nd Jan 2023 12:05pm |
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moge Member Since: 27 Oct 2021 Location: Dartmoor Posts: 7 |
Thanks for coming back to me.
What's crank sensor doing? - nothing that seems to be different. So it turns over every time? - it was intermittent but now will not fire at all. It cuts out just before it would fire and go into idle. Just sometimes fires sometimes doesn't? No it will not fire at all now. Or doesn't turn over or turns over slowly? When it did turn over previously it would turn over just fine (as they all do). Or turns over fast but doesn't fire at all? Correct. Now it turns over fast but doesn’t fire and goes dead. Hope that make sense. |
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2nd Jan 2023 12:27pm |
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blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17373 |
Any stored DTCs in the ECM?
What fuel rail pressure are you seeing when it starts and when it fails to start? |
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2nd Jan 2023 1:34pm |
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moge Member Since: 27 Oct 2021 Location: Dartmoor Posts: 7 |
So just got a Diagnostic tool.
Completed a smart scan and it comes up with: P1402 - exhaust Gas’s Recirculation - metering orifice restricted / value sensor circuit. P0403 - exhaust gas recirculation control circuit P0404 - exhaust gas recirculating control - circuit range /performance P1103 - mass air flow sensor in range but higher than expected. When I looked at the data is comes up with the attached. Guessing the EGR is faulty? |
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2nd Jan 2023 1:44pm |
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moge Member Since: 27 Oct 2021 Location: Dartmoor Posts: 7 |
Also to add - the last time home, at the end the EGR did complete a cleaning when I turned the car off.
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2nd Jan 2023 1:53pm |
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jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8025 |
MiL light on? Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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2nd Jan 2023 2:30pm |
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moge Member Since: 27 Oct 2021 Location: Dartmoor Posts: 7 |
No, the MiL light is not on.
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2nd Jan 2023 2:36pm |
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Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1999 |
The EGR does not do its little waggle dance every time the engine is stopped, so even if it does not do it, it is not necessary an issue.
So I would. 1.Check the fuel filter is sealing properly as you stated you had a big service and as such I expect the fuel filter was replaced, if aftermarket one used they sometimes do not fit correctly, or if gen may not be screwed fully home. As your mechanic said their was air in the system it could be the issue. 2.Clear the DTC’s now you have them recorded, then see if they reappear. If not then you can rule out the MAF and EGR. Noting an EGR or MAF issue generally triggers a MIL / CEL. 3. Give your MAF and MAP sensors a clean anyway, easy and quick to do so no downsides in doing so. 4. check air filter and air box lid is fitted correctly and all pipe clips secured. If after clearing DTC’s they do not reappear yet issue persists it could be VCV or potentially ignition switch, relay or poor seating fuse. |
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2nd Jan 2023 4:40pm |
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blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17373 |
It is sounding like another VCV problem, hence my question about fuel rail pressure.
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2nd Jan 2023 5:58pm |
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moge Member Since: 27 Oct 2021 Location: Dartmoor Posts: 7 |
Thanks Ianh. Will look at this tomorrow.
Thanks Blackwolf. How do you test the Fuel rail pressure? Thanks, Jon |
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2nd Jan 2023 6:14pm |
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mwestcrew Member Since: 09 Dec 2019 Location: South Warwickshire Posts: 251 |
I’d bet good money on that being VCV.
No MIL light. No related fault codes Intermittent No consistent fault 2011 130 Utility Body 2005 110 Van |
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2nd Jan 2023 6:41pm |
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blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17373 |
Hopefully your diagnostic tools can also display live data. |
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2nd Jan 2023 8:17pm |
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