EA laggy after gasket change & other problems!

[RUQ1KA]

i done a headgasket change to my ghia last week, finally managed to get it driving and out of the garage today, but it seems to still have a few problems,

1st, the injectors have to be in exactly the right position to get it idling right

2nd, once you accelerate it makes a "putt putt putt" sound then starts to rev up

3rd, 0nce on the road, it really lags and idles rough, and once i accelerate still makes the "putt putt putt" sound before it starts moving

4th, the exhaust, when the cars in park & idling, has a stop in it's blow, it sort of blows then stops then blows then stops etc... making a "putt putt putt" sound again (i checked this on the ED and the ED's exhaust blows constantly)

and, when the head gasket was blown the car was blowing water out the exhaust and still does if i rev it a bit or it's on my drive way (on an angle)

so i've sort of run out of ideas on whats up with it..., any one got any ideas on what could be wrong and how to fix it?