power problem

[jcb donk]

hi can anyone help got 2007 1.9 doblo had new egr valve , mass flow metre , car still goes in limp moad , switch off enginge turn on and goes back to full power for about 2mins engine man light sometimes goes off if i drive for about 2days then will be ok for about a week or 2 then starts all over again ? doing my head in ..

 

[DaveMcT]

Check out the manifold air pressure sensor.

Also check the turbo. If the wastegate vanes stick it could go overboost and ECU cuts to limp mode to avoid engine damage.