Right as some will know I've just had some work done to the focus rs engine.

I've had new rings fitted as i had a problem with number 4, also had 8 new exhaust valves and head fully stripped checked and re built, had quite a few new shims fitted also.

Now my problem is the car starts on 3 cylinders still but after about 25 seconds it starts to pick up and fire on all 4 but you can still tell its not right,its now number 1 that is missing. I've done a cold comp check last night and number 1 is only 40psi and other 3 are all 160psi.

Any engine builders got any idea please as im Fooking sick now.