trouble after bosch pump upgrade

[randomcaller]

Still can't get the car going properly. Replaced all the leak off lines and replaced the feed from the fuel filter to the pump to an 8mm line. Still runs super lumpy and Smokey, if you prime it up real hard it runs fine and normal for a few seconds then starts struggling to tick over again. I can still hear a high pitch squeel when priming it up as if pressure is escaping but not diesel leaking anywhere. I can't pin point where this is coming from at all. This happened before and after all the lines were changed for new ones so doubt it's that.

I did think it could be the metal injector lines but nothing would go through them with the ignition off.

Any thoughts? I'm really stuck and need it running