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Engine cutting off at high speed


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Hi guys. My ford smax diesel 210 bhp has been cutting off power completely at high speed and under load I.e. engine turns off completely. Its been very scary as it has happened me over taking cars on fast lane with my kids at the back. Any one knows what could have been causing it? There is no engine management light on afterwards. Once pulled over. I put the car into park and it restarts like nothing happened. No fault codes were recorded.

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Hi

Possible high pressure fuel pump can't keep up with fuel demand. Usually car must goes in limp mode, reduced power but not cutting off completley. 

After diagnostic should be an error code stored in memory.

Is a spung in the high pressure fuel pump which somethimes snaps a coil and pump is not maintaining pressure.

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  • 2 weeks later...
On 2/14/2021 at 11:51 PM, Costi said:

Hi

Possible high pressure fuel pump can't keep up with fuel demand. Usually car must goes in limp mode, reduced power but not cutting off completley. 

After diagnostic should be an error code stored in memory.

Is a spung in the high pressure fuel pump which somethimes snaps a coil and pump is not maintaining pressure.

I have had the codes now. Wondering if someone can explain exactly what is wrong with my car.

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On 2/14/2021 at 11:51 PM, Costi said:

Hi

Possible high pressure fuel pump can't keep up with fuel demand. Usually car must goes in limp mode, reduced power but not cutting off completley. 

After diagnostic should be an error code stored in memory.

Is a spung in the high pressure fuel pump which somethimes snaps a coil and pump is not maintaining pressure.

Mine isn't going into limp mode. It simply cuts out. 

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The code seems to come up fuel pressure regulator if you google it. Think that’s one best left to a competent   Mechanic. 

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