 | Home > Td5 > Help diagnosing engine cutting out issue |
 
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| TD5Ad&Alf Member Since: 06 Jan 2025 Location: Staffordshire Posts: 15   
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More testing today, replaced the injector loom - no better - Removed CPS, very dirty and plug was also dirty (rear of rocker gasket was leaking straight onto the CPS) unfortunately I broke it getting it out so will have to replace it now.
What I have noticed today is that the car only cuts out when the engine is revved fairly hard and if I switch the ignition off and wait after 1-2mins the main relay under the drivers seat clicks and the car can be restarted. I’m thinking MadTom is right likely an ECU issue, I removed the ECU this evening and opened it, its extremely clean inside, I can’t see anything obvious but I guess I wouldn’t if a component had failed. I’ll try the new CPS when it arrives and report back, but if anyone has a good ECU for sale please PM me! |
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19th Jan 2025 7:41pm |
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| mrd1990 Member Since: 16 Aug 2012 Location: Wales Posts: 601  
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Was it red and did it say on until the ignition turned off? As far as I'm aware, only the crank position sensor or associated wiring will cause the engine to shut off with the red malfunction light immediately illuminating. Broken sensor = Replace Faulty wiring = https://www.empiretuning.co.uk/product/td5...y-harness/ |
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20th Jan 2025 11:27pm |
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| TD5Ad&Alf Member Since: 06 Jan 2025 Location: Staffordshire Posts: 15
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It’s the yellow EML which comes on when it stalls, no sign of the red crossed eml at all, i did notice that the glow plug light doesn’t illuminate when it’s cranking but not starting, if I wait until the main relay clicks the glow plug light does illuminate and it starts, but it might not be connected.
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21st Jan 2025 9:15pm |
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| TD5Ad&Alf Member Since: 06 Jan 2025 Location: Staffordshire Posts: 15
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I’m going to replace the CS at the weekend and the plug & section of the loom. If that doesn’t make any difference I’ll get the codes read and send the ECU off.
Does anyone know if a garage quality snap on code reader will read td5 fault codes? I’ve tried my cheap code reader and don’t get anything. |
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21st Jan 2025 9:17pm |
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| rustandoil Member Since: 08 Sep 2012 Location: Cotswolds Posts: 777 
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Just read this thread.... I had similar, replaced Crank sensor and all good..
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21st Jan 2025 9:25pm |
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| TD5Ad&Alf Member Since: 06 Jan 2025 Location: Staffordshire Posts: 15
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Really hope the CS solves it, the old one was very dirty both on the tip and around the connector/harness so maybe the issue?
I read a post about a very similar fault description which turned out to be the ECU Was yours cutting out when revved? And restarting fine after a brief wait? |
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21st Jan 2025 9:54pm |
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| rustandoil Member Since: 08 Sep 2012 Location: Cotswolds Posts: 777
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No, mine was crank no start, and briefly cutting out during normal running with the engine light just flashing on for a second or two but not putting me at the side of the road.
Before I swapped the crank sensor I also fitted a new fuel pump relay and main relay the socket of which is a little discoloured from getting hot.... |
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22nd Jan 2025 3:24am |
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| TD5Ad&Alf Member Since: 06 Jan 2025 Location: Staffordshire Posts: 15
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As an update the crank sensor replacement made no difference 🙄 I also checked the Westgate as I guess it’s possible for the ECU to shut the engine off if it detects an increased boost pressure? Anyway wastegate was free so it’s not that either. so next step is to get the ECU codes read. I’ve ordered an AlivePower flash reader as they were offering the 10AS adapter free (I only have one fob for the alarm so this will come in handy) it should arrive this week so I’ll have the codes at the weekend. If anyone is considering selling an NNN500020 ECU please PM me (be worth having a spare!)
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4th Feb 2025 1:33pm |
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| rustandoil Member Since: 08 Sep 2012 Location: Cotswolds Posts: 777
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I have to say the the Alive Power flash looks pretty good, should be easier to use than Nanocom MK1
I hope it helps you sort out what going on 
My cutting out issue has returned, Nanocom says "noisy crank signal was detected"..... I suspect (hope) that its because of a slave cylinder leak causing muck to be chucked around the bell housing....I will take the CPS out and give it a wash with brake cleaner. |
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5th Feb 2025 9:41am |
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