Hi, my hawk wrx has suddenly started having issues on start up. It cranks but takes a few seconds to fire.

Any ideas if this could be plugs or cam/crank sensor?

 

Try removing the cam and crank sensors and wiping them clean. Could also be worth pulling the coils to se if they are damp as the weather has got a bit moist.

 

battery getting old depending on cranking speed , try a reset i have to do it on mine every so often as some one other than me ( the mrs ) keeps using the accelerator pedal to start it which confuses the ecu as its fly by wire