2004 Land Rover Freelander 57000 miles

I just replaced the CAM shaft and front timing belt because car refused to start. Now that starts, it runs well for about 10 minutes then it starts shaking. The light(s) attached to the fuel injectors blinks for about 10 seconds then the go dead. I've taken it into the dealer and a local mechanic to no avail. Can someone please help? Thanks in advance.

DeeDee