General Doblo Multijet 1.4 help req

[gselectrical]

Doblo Multijet 1.3 help req

Hi all
I have the above van and have a problem that when I am travelling on the motorway and reach approx 60mph the power disappears and does not kick back in til speed drops to 40mph (engine light appears on dash)
I have taken it to 2 garages and both cannot find a fault on it.
be grateful if someone can help Manchester

1.3 multijet not 1.4 as stated in title sorry

 

[ivantate]

Is it a 1.3 multijet or a 1.4 Petrol?


Maybe fuel filter/pump?

 

[gselectrical]

sorry 1.3 multijet