I replaced the alternator on a friend's 2.0l hdi Picasso. A simple job I thought it also needed a battery as the had been run very low. It started perfectly after replacment and they drove away. The next day they call saying it won' start. I go to investigate and they are nearly correct. It did start but took forever chasing and chattering. It cleared and ran quite well revvd clear etc. The next day won' start again. I visit and collect the car. It drives but is under powered and a little noise. It appears like the injection timing is out. I have checked the cambelt and all is good. Any help would be very appreciated.