poorly running 240D

The guy who posted this video on youtube.com has been trying to fix this car for several weeks. He bought the car recently, could not get it started, so he pulled the head off, found a cracked piston, replaced it along with all piston rings on all other pistons. He claims that the compression is up to 300-350 psi in all cylinders now. The engine runs terrible. The ALDA is turned all the way out. he lives in area with 7500 ft altitude above sea level. It looks like his injection timing or valve timing is way off(timing chain was not replaced, valve adjustment was done. Could it be bad injectors too? Any ideas?

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