Lucky,

What engine is it. That will determine if something is wrong with your turbine or if it's OPS Normal. An old Jet Cat P-80 might take 7 to 8 seconds to spool up...a new SX or what ever they are called spool much faster. If it's a Falcon and it's messed up internally or the settings in the ECU are all mis set...that could be a reason.

So...what's the engine and how old is it?

Beave