Having problems with a Kangoo.
It has trouble starting from cold, but is OK starting after that. Also when it reaches 3500 rpm on the road it brings on a light and gives a rail pressure codes although it drives fine. As soon as the rpm drops below 3000 the light goes out. But it only does this under load, you cant get the light to come on in the workshop.
It has had 4 injectors and a fuel filter and now the leak offs are all even.
Scoping the pressure regulator to see pulse duty and I suspect the pump, but would apreciate some advice.
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Idle speed

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Wot in workshop


I have a 2003 Megane 1.5 in today and scoped that as a comparison and the Kangoo seems to have a faster frequency

Megane at Idle

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Megane at WOT in the workshop


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Why would the Kangoo have a higher frequency at Idle ?