Ford escort diesel k reg?

Can anyone help, i have an 1.8 escort diesel k reg, the problem is starting from cold, it wants to fire but dosn't. Changed the glow plugs, injectors, fuel filter, air filter, compresion test reads between 185 and 200 psi on all. Tried conecting the glow plugs direct to battery, this helps but still takes a while to start. Once started it is fine and will start all day long. It also seems to be a bit slugish, my next guess would be that the timing is slightly out, checked pump and camshaft and holes are aligned, has anyone come across the same problem ???? HELP !!!!!!!