Juddering, no power at times.

Christopherski

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Hi all, recently got my car back on the road after an engine replacement. Now it is juddering and feels like a miss fire. I've got the egr blanked off but not had it mapped out yet. Today though I had no power and had to pull off the motorway and turned it off and then it wouldn't restart, eventually it got going again. I'm thinking it could be either the vaccuum or injector wiring loom. I have a new loom coming. Im getting a miss fire fault code on 4 and sometimes on 3 as well. Also boost pressure not reached and egr fault. Any other ideas what could be wrong, i'm meant to be driving to france in it on friday so need to get it sorted asap!
 
erm, I suspect the fact you mention you've blocked the egr valve but not mapped it out would be a good starting point
 
It was doing it prior to blanking the egr. I'll get it in for mapping this week.