The lobe seperation isn't critical, I was just curious.
Is it a reground cam, or a custom new unit?
When a camshaft is reground, the point in it's rotation when the valve begins to open is changed. This can mean that intake or exhaust cycle can begin too soon, or too late. This can have an adverse effect on the engines running characteristics.
if your engine has computerised management, depending on what mapping sensors it uses, the ecu might struggle to adapt to the engines new air flow behaviors. If the valve timing is too far advanced or retarded, then a probelm such as this might be exassabated. (spelling)
I know bugger all about ecu's and such so I can't say too much more with any authority.