Friday, September 09, 2016 - 11:08 am, by: Tai Johnsen(Privatejohnsen)
More likely that your timing on the cams was set wrong when they changed the timing belt? or it could possibly be that the harmonic balancer / crankshaft keyway may have been damaged before and bee re-cut 180 degrees out?
It doesn't explain your bad running, but like you, i doubt it could slip that far and still run..