hi people newbie here looking for some help
ill start off withe the spec its a escos running a gulian godfery specd engine rebuilt buy mark sheed, t4, db 16s, standard pullys, semins injectors, ceramic coated lo comp pistons, autronic ecu, 433bhp @ 1.6 bar

when the cars started first thing in the morning it runs fine for about an hour after that on high boost it misfires n it feels like im going t go through the screen, if i gradually build boost up its ok until the boost gauges right round then i get it again, if i let the car cool down it seems t be ok for a while until back up to temp, first and second gear is ok on full boost but when in 3rd, 4rth, and 5th thats when i get my prob, iv fitted new bosch 023 pump n filter,new plugs and had a good look at everything but no joy, im waiting for my new cam pullys t be sent t me then ill be taking it t mark sheed t get set up and mapped for 2 bar but would like t get to the back of this before i drive 600+ miles, before i took her off the road for the pump change she had broke down one night only runing on three cylinders after leaving the car over night the car started first turn of the key and its never happened again, cheers for any help Kris