cold start problems td4
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andyfreelandy
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You've changed the glow plugs, but did you check they are getting power??
Hi yes first thing I checked.
paul99
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Not all glow plugs are created equal. The cheaper ones can be really poor performing. Stick to Bosch or Delphi or other good brand types, if you can.
Really think you'll find its the other way round
Which? There are 2 correct suggestions there.
Cam sensor pal according to land-rover once started it doesn't do anything for hot start .
That's incorrect information.
The cam sensor is used by the EDC to locate the correct firing sequence. This is done every time the engine is started, regardless of it being hot or cold. If the EDC can't determine the correct firing sequence, the engine can't start. The cam sensor normally fails hot, so first start in the morning is normal, but a subsequent re-start when hot fails, as the EDC can't see the firing sequence.
To be honest that's what I thought but land-rover are adamant on the BMW engine it only does cold start ,now you know why I'm so confused pal .That's incorrect information.
The cam sensor is used by the EDC to locate the correct firing sequence. This is done every time the engine is started, regardless of it being hot or cold. If the EDC can't determine the correct firing sequence, the engine can't start. The cam sensor normally fails hot, so first start in the morning is normal, but a subsequent re-start when hot fails, as the EDC can't see the firing sequence.
It's complete rubbish. The M47R is no different to any other sequential common rail engine, so needs to know where to the cam is in relation to the crankshaft, or it can't identify No1 cylinder. Until the engine is rotating, the EDC can't get this information, so can't identify No1, which means no injection sequence can start.
However the cam position sensor failing normally effects hot starting, so it wouldn't be my first port of call for a non start from cold. For the few £ the pressure regulator O rings cost, I'd be replacing them first.
You need to check the regulator O ring for splits, cracks, or deformation. If the rubber O ring is leaking just a tiny bit, then the rail pressure won't build enough for correct injector fuel delivery.
Makes sense
Hi pal could you tell me where I can get the pressure regulator repair kit from please pal everybody I've tried only sell the complete regulator.
Cheers .
paul99
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It's worth checking the MAF sensor and air temperature sensor are clean and performing properly. Is there any smoke when you cold start or when you restart?
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