*click* is AC clutch engaging, which means it's probably burnt and causing a lot of resistance on the accessory belt, so every time it engages the computer will try to save engine from bogging down, and thus you have PRM spikes.
....there, that's my uneducated reply.
Blue SVT 2002
Our Lady of blessed acceleration
Originally Posted by Black&Tan
But.... why read facts and investigate a claim when it supports your ideology?
...that should be written as 'The First Law of Internet Forums'