cam and crank sensors
 

just had a recoditioned engine put in my wrx, the engine management light was on so i had it checked out and it says its the crank and cam sensors. i tried putting the old ones on off the old engine exactly the same. also its idling poorly once driven it seems ok but not quite 100 % any help would be appreciated please the lad who put the engine in for me works for renault so it was his first subaru job could of done something wrong?

has it had a cambelt? if so i would double check the timing mate.

it has mate but the lad who done it says its spot on but im not 100% sure